231857955 has 72 divisors (see below), whose sum is σ = 474405984. Its totient is φ = 104428800.

The previous prime is 231857953. The next prime is 231857999. The reversal of 231857955 is 559758132.

231857955 is a `hidden beast` number, since 23 + 1 + 8 + 579 + 55 = 666.

It is not a de Polignac number, because 231857955 - 2¹ = 231857953 is a prime.

It is a super-2 number, since 2×231857955² = 107516222593564050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 231857955.

It is not an unprimeable number, because it can be changed into a prime (231857953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 155815 + ... + 157295.

It is an arithmetic number, because the mean of its divisors is an integer number (6588972).

Almost surely, 2^231857955 is an apocalyptic number.

231857955 is an abundant number, since it is smaller than the sum of its proper divisors (242548029).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231857955 is a wasteful number, since it uses less digits than its factorization.

231857955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577 (or 1567 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The square root of 231857955 is about 15226.8826422219. The cubic root of 231857955 is about 614.3379351547.

The spelling of 231857955 in words is "two hundred thirty-one million, eight hundred fifty-seven thousand, nine hundred fifty-five".