22451213256 has 32 divisors (see below), whose sum is σ = 56280992640. Its totient is φ = 7463343168.

The previous prime is 22451213249. The next prime is 22451213269. The reversal of 22451213256 is 65231215422.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265671 + ... + 1283286.

It is an arithmetic number, because the mean of its divisors is an integer number (1758781020).

Almost surely, 2^22451213256 is an apocalyptic number.

It is an amenable number.

22451213256 is an abundant number, since it is smaller than the sum of its proper divisors (33829779384).

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

22451213256 is a wasteful number, since it uses less digits than its factorization.

22451213256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549333 (or 2549329 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

Adding to 22451213256 its reverse (65231215422), we get a palindrome (87682428678).

The spelling of 22451213256 in words is "twenty-two billion, four hundred fifty-one million, two hundred thirteen thousand, two hundred fifty-six".