22981565 has 16 divisors (see below), whose sum is σ = 28459200. Its totient is φ = 17805312.

The previous prime is 22981561. The next prime is 22981573. The reversal of 22981565 is 56518922.

It is a cyclic number.

It is not a de Polignac number, because 22981565 - 2² = 22981561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22981561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29501 + ... + 30269.

It is an arithmetic number, because the mean of its divisors is an integer number (1778700).

Almost surely, 2^22981565 is an apocalyptic number.

It is an amenable number.

22981565 is a deficient number, since it is larger than the sum of its proper divisors (5477635).

22981565 is a wasteful number, since it uses less digits than its factorization.

22981565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its digits is 43200, while the sum is 38.

The square root of 22981565 is about 4793.9091564192. The cubic root of 22981565 is about 284.3106969691.

The spelling of 22981565 in words is "twenty-two million, nine hundred eighty-one thousand, five hundred sixty-five".