2256721324 has 48 divisors (see below), whose sum is σ = 4644442656. Its totient is φ = 945907200.

The previous prime is 2256721319. The next prime is 2256721331. The reversal of 2256721324 is 4231276522.

It is a super-2 number, since 2×2256721324² = 10185582268392625952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2256721324.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946614 + ... + 948994.

It is an arithmetic number, because the mean of its divisors is an integer number (96759222).

Almost surely, 2^2256721324 is an apocalyptic number.

It is an amenable number.

2256721324 is an abundant number, since it is smaller than the sum of its proper divisors (2387721332).

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

2256721324 is a wasteful number, since it uses less digits than its factorization.

2256721324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066 (or 4064 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 2256721324 is about 47504.9610461897. The cubic root of 2256721324 is about 1311.6742038499.

Adding to 2256721324 its reverse (4231276522), we get a palindrome (6487997846).

The spelling of 2256721324 in words is "two billion, two hundred fifty-six million, seven hundred twenty-one thousand, three hundred twenty-four".