231087155 has 16 divisors (see below), whose sum is σ = 304274880. Its totient is φ = 167426688.

The previous prime is 231087097. The next prime is 231087161. The reversal of 231087155 is 551780132.

231087155 = T₄₅₀ + T₄₅₁ + ... + T₁₁₃₈.

231087155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231087155 - 2¹⁰ = 231086131 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30095 + ... + 36984.

It is an arithmetic number, because the mean of its divisors is an integer number (19017180).

Almost surely, 2^231087155 is an apocalyptic number.

231087155 is a deficient number, since it is larger than the sum of its proper divisors (73187725).

231087155 is a wasteful number, since it uses less digits than its factorization.

231087155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67150.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 231087155 is about 15201.5510721768. The cubic root of 231087155 is about 613.6564009286.

The spelling of 231087155 in words is "two hundred thirty-one million, eighty-seven thousand, one hundred fifty-five".