22921665 has 64 divisors (see below), whose sum is σ = 41997312. Its totient is φ = 10598400.

The previous prime is 22921663. The next prime is 22921667. The reversal of 22921665 is 56612922.

It is an interprime number because it is at equal distance from previous prime (22921663) and next prime (22921667).

It is not a de Polignac number, because 22921665 - 2¹ = 22921663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22921663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 375735 + ... + 375795.

It is an arithmetic number, because the mean of its divisors is an integer number (656208).

Almost surely, 2^22921665 is an apocalyptic number.

It is an amenable number.

22921665 is a deficient number, since it is larger than the sum of its proper divisors (19075647).

22921665 is a wasteful number, since it uses less digits than its factorization.

22921665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170.

The product of its digits is 12960, while the sum is 33.

The square root of 22921665 is about 4787.6575692086. The cubic root of 22921665 is about 284.0634694157.

The spelling of 22921665 in words is "twenty-two million, nine hundred twenty-one thousand, six hundred sixty-five".