231960631 has 32 divisors (see below), whose sum is σ = 292073472. Its totient is φ = 179642880.

The previous prime is 231960601. The next prime is 231960653. The reversal of 231960631 is 136069132.

It is a cyclic number.

It is not a de Polignac number, because 231960631 - 2⁹ = 231960119 is a prime.

It is a super-2 number, since 2×231960631² = 107611468667836322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231960593 and 231960602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231960601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 837265 + ... + 837541.

It is an arithmetic number, because the mean of its divisors is an integer number (9127296).

Almost surely, 2^231960631 is an apocalyptic number.

231960631 is a deficient number, since it is larger than the sum of its proper divisors (60112841).

231960631 is a wasteful number, since it uses less digits than its factorization.

231960631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 231960631 is about 15230.2538061583. The cubic root of 231960631 is about 614.4286062626.

The spelling of 231960631 in words is "two hundred thirty-one million, nine hundred sixty thousand, six hundred thirty-one".