23231145 has 24 divisors (see below), whose sum is σ = 43239744. Its totient is φ = 10619616.

The previous prime is 23231141. The next prime is 23231149. The reversal of 23231145 is 54113232.

It is an interprime number because it is at equal distance from previous prime (23231141) and next prime (23231149).

It is not a de Polignac number, because 23231145 - 2² = 23231141 is a prime.

It is a super-2 number, since 2×23231145² = 1079372196022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (23231141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15069 + ... + 16538.

It is an arithmetic number, because the mean of its divisors is an integer number (1801656).

Almost surely, 2^23231145 is an apocalyptic number.

It is an amenable number.

23231145 is a deficient number, since it is larger than the sum of its proper divisors (20008599).

23231145 is a wasteful number, since it uses less digits than its factorization.

23231145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31629 (or 31622 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 23231145 is about 4819.8698115198. The cubic root of 23231145 is about 285.3361991237.

Adding to 23231145 its reverse (54113232), we get a palindrome (77344377).

The spelling of 23231145 in words is "twenty-three million, two hundred thirty-one thousand, one hundred forty-five".