231263557 has 8 divisors (see below), whose sum is σ = 264586176. Its totient is φ = 198012192.

The previous prime is 231263521. The next prime is 231263561. The reversal of 231263557 is 755362132.

231263557 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 not a de Polignac number, because 231263557 - 2²⁷ = 97045829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231263587) 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, 10663 + ... + 24004.

It is an arithmetic number, because the mean of its divisors is an integer number (33073272).

Almost surely, 2^231263557 is an apocalyptic number.

It is an amenable number.

231263557 is a deficient number, since it is larger than the sum of its proper divisors (33322619).

231263557 is an equidigital number, since it uses as much as digits as its factorization.

231263557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35627.

The product of its digits is 37800, while the sum is 34.

The square root of 231263557 is about 15207.3520706269. The cubic root of 231263557 is about 613.8125075191.

The spelling of 231263557 in words is "two hundred thirty-one million, two hundred sixty-three thousand, five hundred fifty-seven".