231163136 has 18 divisors (see below), whose sum is σ = 461423802. Its totient is φ = 115581440.

The previous prime is 231163129. The next prime is 231163151. The reversal of 231163136 is 631361132.

It can be written as a sum of positive squares in only one way, i.e., 223323136 + 7840000 = 14944^2 + 2800^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 451235 + ... + 451746.

Almost surely, 2^231163136 is an apocalyptic number.

It is an amenable number.

231163136 is a deficient number, since it is larger than the sum of its proper divisors (230260666).

231163136 is an frugal number, since it uses more digits than its factorization.

231163136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902997 (or 902983 counting only the distinct ones).

The product of its digits is 1944, while the sum is 26.

The square root of 231163136 is about 15204.0499867634. The cubic root of 231163136 is about 613.7236498961.

The spelling of 231163136 in words is "two hundred thirty-one million, one hundred sixty-three thousand, one hundred thirty-six".