231057387 has 32 divisors (see below), whose sum is σ = 395400960. Its totient is φ = 131794560.

The previous prime is 231057377. The next prime is 231057391. The reversal of 231057387 is 783750132.

231057387 is a `hidden beast` number, since 2 + 3 + 1 + 0 + 573 + 87 = 666.

It is not a de Polignac number, because 231057387 - 2¹⁰ = 231056363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231057367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17833 + ... + 27930.

It is an arithmetic number, because the mean of its divisors is an integer number (12356280).

Almost surely, 2^231057387 is an apocalyptic number.

231057387 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

231057387 is a deficient number, since it is larger than the sum of its proper divisors (164343573).

231057387 is a wasteful number, since it uses less digits than its factorization.

231057387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45800 (or 45794 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 231057387 is about 15200.5719300295. The cubic root of 231057387 is about 613.6300499642.

The spelling of 231057387 in words is "two hundred thirty-one million, fifty-seven thousand, three hundred eighty-seven".