231564097 has 4 divisors (see below), whose sum is σ = 231669760. Its totient is φ = 231458436.

The previous prime is 231564083. The next prime is 231564119. The reversal of 231564097 is 790465132.

231564097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231564097 - 2²³ = 223175489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231564197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49473 + ... + 53950.

It is an arithmetic number, because the mean of its divisors is an integer number (57917440).

Almost surely, 2^231564097 is an apocalyptic number.

It is an amenable number.

231564097 is a deficient number, since it is larger than the sum of its proper divisors (105663).

231564097 is a wasteful number, since it uses less digits than its factorization.

231564097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105662.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 231564097 is about 15217.2302670361. The cubic root of 231564097 is about 614.0782870465.

The spelling of 231564097 in words is "two hundred thirty-one million, five hundred sixty-four thousand, ninety-seven".