23131138 has 8 divisors (see below), whose sum is σ = 34897788. Its totient is φ = 11498544.

The previous prime is 23131111. The next prime is 23131181. The reversal of 23131138 is 83113132.

It can be written as a sum of positive squares in 2 ways, for example, as 16459249 + 6671889 = 4057^2 + 2583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33081 + ... + 33772.

Almost surely, 2^23131138 is an apocalyptic number.

23131138 is a deficient number, since it is larger than the sum of its proper divisors (11766650).

23131138 is a wasteful number, since it uses less digits than its factorization.

23131138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67028.

The product of its digits is 432, while the sum is 22.

The square root of 23131138 is about 4809.4841719253. The cubic root of 23131138 is about 284.9261653404.

The spelling of 23131138 in words is "twenty-three million, one hundred thirty-one thousand, one hundred thirty-eight".