2021312256 has 36 divisors (see below), whose sum is σ = 5379640392. Its totient is φ = 673770496.

The previous prime is 2021312233. The next prime is 2021312261. The reversal of 2021312256 is 6522131202.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315191 + ... + 1316726.

Almost surely, 2^2021312256 is an apocalyptic number.

It is an amenable number.

2021312256 is an abundant number, since it is smaller than the sum of its proper divisors (3358328136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021312256 is an equidigital number, since it uses as much as digits as its factorization.

2021312256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631936 (or 2631922 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2021312256 is about 44959.0063947147. The cubic root of 2021312256 is about 1264.3805402325.

Adding to 2021312256 its reverse (6522131202), we get a palindrome (8543443458).

The spelling of 2021312256 in words is "two billion, twenty-one million, three hundred twelve thousand, two hundred fifty-six".