231915855 has 16 divisors (see below), whose sum is σ = 371259360. Its totient is φ = 123623808.

The previous prime is 231915841. The next prime is 231915869. The reversal of 231915855 is 558519132.

It is an interprime number because it is at equal distance from previous prime (231915841) and next prime (231915869).

It is not a de Polignac number, because 231915855 - 2⁵ = 231915823 is a prime.

It is a congruent number.

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, 44149 + ... + 49121.

It is an arithmetic number, because the mean of its divisors is an integer number (23203710).

Almost surely, 2^231915855 is an apocalyptic number.

231915855 is a deficient number, since it is larger than the sum of its proper divisors (139343505).

231915855 is a wasteful number, since it uses less digits than its factorization.

231915855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090.

The product of its digits is 54000, while the sum is 39.

The square root of 231915855 is about 15228.7837662763. The cubic root of 231915855 is about 614.3890687693.

The spelling of 231915855 in words is "two hundred thirty-one million, nine hundred fifteen thousand, eight hundred fifty-five".