231938657 has 8 divisors (see below), whose sum is σ = 237607776. Its totient is φ = 226334592.

The previous prime is 231938639. The next prime is 231938659. The reversal of 231938657 is 756839132.

231938657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231938657 - 2⁸ = 231938401 is a prime.

It is a super-2 number, since 2×231938657² = 107591081221927298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231938659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9008 + ... + 23345.

It is an arithmetic number, because the mean of its divisors is an integer number (29700972).

Almost surely, 2^231938657 is an apocalyptic number.

It is an amenable number.

231938657 is a deficient number, since it is larger than the sum of its proper divisors (5669119).

231938657 is a wasteful number, since it uses less digits than its factorization.

231938657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32527.

The product of its digits is 272160, while the sum is 44.

The square root of 231938657 is about 15229.5323959733. The cubic root of 231938657 is about 614.4092037164.

The spelling of 231938657 in words is "two hundred thirty-one million, nine hundred thirty-eight thousand, six hundred fifty-seven".