231361957 has 4 divisors (see below), whose sum is σ = 231428236. Its totient is φ = 231295680.

The previous prime is 231361931. The next prime is 231361961. The reversal of 231361957 is 759163132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 142229476 + 89132481 = 11926^2 + 9441^2 .

It is a cyclic number.

It is not a de Polignac number, because 231361957 - 2²³ = 222973349 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 (231361987) 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, 27594 + ... + 34987.

It is an arithmetic number, because the mean of its divisors is an integer number (57857059).

Almost surely, 2^231361957 is an apocalyptic number.

It is an amenable number.

231361957 is a deficient number, since it is larger than the sum of its proper divisors (66279).

231361957 is an equidigital number, since it uses as much as digits as its factorization.

231361957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66278.

The product of its digits is 34020, while the sum is 37.

The square root of 231361957 is about 15210.5870037944. The cubic root of 231361957 is about 613.8995519100.

The spelling of 231361957 in words is "two hundred thirty-one million, three hundred sixty-one thousand, nine hundred fifty-seven".