231285057 has 16 divisors (see below), whose sum is σ = 314729280. Its totient is φ = 151025472.

The previous prime is 231285023. The next prime is 231285107. The reversal of 231285057 is 750582132.

It is not a de Polignac number, because 231285057 - 2²³ = 222896449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231285757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157794 + ... + 159252.

It is an arithmetic number, because the mean of its divisors is an integer number (19670580).

Almost surely, 2^231285057 is an apocalyptic number.

It is an amenable number.

231285057 is a deficient number, since it is larger than the sum of its proper divisors (83444223).

231285057 is a wasteful number, since it uses less digits than its factorization.

231285057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 231285057 is about 15208.0589491230. The cubic root of 231285057 is about 613.8315284724.

The spelling of 231285057 in words is "two hundred thirty-one million, two hundred eighty-five thousand, fifty-seven".