231708231 has 24 divisors (see below), whose sum is σ = 347564880. Its totient is φ = 148571136.

The previous prime is 231708199. The next prime is 231708247. The reversal of 231708231 is 132807132.

It is not a de Polignac number, because 231708231 - 2⁵ = 231708199 is a prime.

It is a super-2 number, since 2×231708231² = 107377408626298722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231708195 and 231708204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231708031) 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 23 ways as a sum of consecutive naturals, for example, 72295 + ... + 75431.

It is an arithmetic number, because the mean of its divisors is an integer number (14481870).

Almost surely, 2^231708231 is an apocalyptic number.

231708231 is a deficient number, since it is larger than the sum of its proper divisors (115856649).

231708231 is a wasteful number, since it uses less digits than its factorization.

231708231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455 (or 3452 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 231708231 is about 15221.9654118645. The cubic root of 231708231 is about 614.2056689154.

The spelling of 231708231 in words is "two hundred thirty-one million, seven hundred eight thousand, two hundred thirty-one".