231553156 has 6 divisors (see below), whose sum is σ = 405218030. Its totient is φ = 115776576.

The previous prime is 231553129. The next prime is 231553163. The reversal of 231553156 is 651355132.

It can be written as a sum of positive squares in only one way, i.e., 210540100 + 21013056 = 14510^2 + 4584^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 28944141 + ... + 28944148.

Almost surely, 2^231553156 is an apocalyptic number.

It is an amenable number.

231553156 is a deficient number, since it is larger than the sum of its proper divisors (173664874).

231553156 is a wasteful number, since it uses less digits than its factorization.

231553156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57888293 (or 57888291 counting only the distinct ones).

The product of its digits is 13500, while the sum is 31.

The square root of 231553156 is about 15216.8707689853. The cubic root of 231553156 is about 614.0686155179.

The spelling of 231553156 in words is "two hundred thirty-one million, five hundred fifty-three thousand, one hundred fifty-six".