22731136 has 32 divisors (see below), whose sum is σ = 45526680. Its totient is φ = 11304960.

The previous prime is 22731131. The next prime is 22731139. The reversal of 22731136 is 63113722.

22731136 = 160² + 161² + ... + 416².

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 22731136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22731131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32551 + ... + 33241.

Almost surely, 2^22731136 is an apocalyptic number.

It is an amenable number.

22731136 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

22731136 is an equidigital number, since it uses as much as digits as its factorization.

22731136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962 (or 950 counting only the distinct ones).

The product of its digits is 1512, while the sum is 25.

The square root of 22731136 is about 4767.7181124727. The cubic root of 22731136 is about 283.2742163475.

Adding to 22731136 its reverse (63113722), we get a palindrome (85844858).

It can be divided in two parts, 2273 and 1136, that multiplied together give a triangular number (2582128 = T₂₂₇₂).

The spelling of 22731136 in words is "twenty-two million, seven hundred thirty-one thousand, one hundred thirty-six".