22551865 has 32 divisors (see below), whose sum is σ = 32117760. Its totient is φ = 14883264.

The previous prime is 22551863. The next prime is 22551887. The reversal of 22551865 is 56815522.

It is a cyclic number.

It is not a de Polignac number, because 22551865 - 2¹ = 22551863 is a prime.

It is a super-2 number, since 2×22551865² = 1017173229956450, 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 22551865.

It is not an unprimeable number, because it can be changed into a prime (22551863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138274 + ... + 138436.

It is an arithmetic number, because the mean of its divisors is an integer number (1003680).

Almost surely, 2^22551865 is an apocalyptic number.

It is an amenable number.

22551865 is a deficient number, since it is larger than the sum of its proper divisors (9565895).

22551865 is a wasteful number, since it uses less digits than its factorization.

22551865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301.

The product of its digits is 24000, while the sum is 34.

The square root of 22551865 is about 4748.8803943667. The cubic root of 22551865 is about 282.5275614637.

The spelling of 22551865 in words is "twenty-two million, five hundred fifty-one thousand, eight hundred sixty-five".