23131044 has 18 divisors (see below), whose sum is σ = 58470230. Its totient is φ = 7710336.

The previous prime is 23131027. The next prime is 23131057. The reversal of 23131044 is 44013132.

It can be written as a sum of positive squares in only one way, i.e., 12320100 + 10810944 = 3510^2 + 3288^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321229 + ... + 321300.

Almost surely, 2^23131044 is an apocalyptic number.

It is an amenable number.

23131044 is an abundant number, since it is smaller than the sum of its proper divisors (35339186).

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

23131044 is a wasteful number, since it uses less digits than its factorization.

23131044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642539 (or 642534 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 23131044 is about 4809.4743995576. The cubic root of 23131044 is about 284.9257793802.

Adding to 23131044 its reverse (44013132), we get a palindrome (67144176).

The spelling of 23131044 in words is "twenty-three million, one hundred thirty-one thousand, forty-four".