23151132 has 18 divisors (see below), whose sum is σ = 58521008. Its totient is φ = 7717032.

The previous prime is 23151109. The next prime is 23151181. The reversal of 23151132 is 23115132.

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 a congruent number.

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, 321508 + ... + 321579.

Almost surely, 2^23151132 is an apocalyptic number.

It is an amenable number.

23151132 is an abundant number, since it is smaller than the sum of its proper divisors (35369876).

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

23151132 is a wasteful number, since it uses less digits than its factorization.

23151132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643097 (or 643092 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 23151132 is about 4811.5623242352. The cubic root of 23151132 is about 285.0082361424.

Adding to 23151132 its reverse (23115132), we get a palindrome (46266264).

The spelling of 23151132 in words is "twenty-three million, one hundred fifty-one thousand, one hundred thirty-two".