312 (number) explained

312 (three hundred [and] twelve) is the natural number following 311 and preceding 313.

Number:

312

Mathematical properties

It's an even number.
It's a semi perfect number, as it is equal to the sum of some or all of its divisors.
It's a Idoneal number.^[1]
It is a Harshad number, as it is divisible by the sum of its digits.^[2]
It's part of the Pythagorean triplets.
It's a practical number.

Notes and References

Web site: A000926 - OEIS . 2023-11-30 . oeis.org.
Web site: A005349 - OEIS . 2023-11-30 . oeis.org.