22641256 has 16 divisors (see below), whose sum is σ = 46311840. Its totient is φ = 10291440.

The previous prime is 22641251. The next prime is 22641259. The reversal of 22641256 is 65214622.

It is not an unprimeable number, because it can be changed into a prime (22641251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128556 + ... + 128731.

It is an arithmetic number, because the mean of its divisors is an integer number (2894490).

Almost surely, 2^22641256 is an apocalyptic number.

It is an amenable number.

22641256 is an abundant number, since it is smaller than the sum of its proper divisors (23670584).

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

22641256 is a wasteful number, since it uses less digits than its factorization.

22641256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257304 (or 257300 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 22641256 is about 4758.2828835621. The cubic root of 22641256 is about 282.9003632315.

Adding to 22641256 its reverse (65214622), we get a palindrome (87855878).

It can be divided in two parts, 22 and 641256, that added together give a triangular number (641278 = T₁₁₃₂).

The spelling of 22641256 in words is "twenty-two million, six hundred forty-one thousand, two hundred fifty-six".