231612878 has 32 divisors (see below), whose sum is σ = 413233920. Its totient is φ = 95296320.

The previous prime is 231612877. The next prime is 231612917. The reversal of 231612878 is 878216132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231612877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32258 + ... + 38778.

It is an arithmetic number, because the mean of its divisors is an integer number (12913560).

Almost surely, 2^231612878 is an apocalyptic number.

231612878 is a deficient number, since it is larger than the sum of its proper divisors (181621042).

231612878 is a wasteful number, since it uses less digits than its factorization.

231612878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6632.

The product of its digits is 32256, while the sum is 38.

The square root of 231612878 is about 15218.8330038804. The cubic root of 231612878 is about 614.1214043376.

The spelling of 231612878 in words is "two hundred thirty-one million, six hundred twelve thousand, eight hundred seventy-eight".