231616931 has 8 divisors (see below), whose sum is σ = 285067104. Its totient is φ = 183257280.

The previous prime is 231616921. The next prime is 231617033. The reversal of 231616931 is 139616132.

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 231616931 - 2²² = 227422627 is a prime.

It is a super-2 number, since 2×231616931² = 107292805451717522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231616901) 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, 1272530 + ... + 1272711.

It is an arithmetic number, because the mean of its divisors is an integer number (35633388).

Almost surely, 2^231616931 is an apocalyptic number.

231616931 is a deficient number, since it is larger than the sum of its proper divisors (53450173).

231616931 is a wasteful number, since it uses less digits than its factorization.

231616931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545261.

The product of its digits is 5832, while the sum is 32.

The square root of 231616931 is about 15218.9661606825. The cubic root of 231616931 is about 614.1249864924.

The spelling of 231616931 in words is "two hundred thirty-one million, six hundred sixteen thousand, nine hundred thirty-one".