231609057 has 16 divisors (see below), whose sum is σ = 322593408. Its totient is φ = 147530240.

The previous prime is 231609047. The next prime is 231609073. The reversal of 231609057 is 750906132.

231609057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 231609057 - 2⁸ = 231608801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231609047) 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, 110257 + ... + 112337.

It is an arithmetic number, because the mean of its divisors is an integer number (20162088).

Almost surely, 2^231609057 is an apocalyptic number.

It is an amenable number.

231609057 is a deficient number, since it is larger than the sum of its proper divisors (90984351).

231609057 is a wasteful number, since it uses less digits than its factorization.

231609057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 231609057 is about 15218.7074681131. The cubic root of 231609057 is about 614.1180271926.

The spelling of 231609057 in words is "two hundred thirty-one million, six hundred nine thousand, fifty-seven".