231657361 has 8 divisors (see below), whose sum is σ = 249687144. Its totient is φ = 213657600.

The previous prime is 231657353. The next prime is 231657379. The reversal of 231657361 is 163756132.

It can be written as a sum of positive squares in 4 ways, for example, as 51265600 + 180391761 = 7160^2 + 13431^2 .

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

It is not a de Polignac number, because 231657361 - 2³ = 231657353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231657061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10065 + ... + 23761.

It is an arithmetic number, because the mean of its divisors is an integer number (31210893).

Almost surely, 2^231657361 is an apocalyptic number.

It is an amenable number.

231657361 is a deficient number, since it is larger than the sum of its proper divisors (18029783).

231657361 is a wasteful number, since it uses less digits than its factorization.

231657361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15011.

The product of its digits is 22680, while the sum is 34.

The square root of 231657361 is about 15220.2943795447. The cubic root of 231657361 is about 614.1607173700.

The spelling of 231657361 in words is "two hundred thirty-one million, six hundred fifty-seven thousand, three hundred sixty-one".