231370731 has 48 divisors (see below), whose sum is σ = 379439424. Its totient is φ = 135032832.

The previous prime is 231370693. The next prime is 231370739. The reversal of 231370731 is 137073132.

It is not a de Polignac number, because 231370731 - 2⁷ = 231370603 is a prime.

It is a super-2 number, since 2×231370731² = 107064830326948722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231370695 and 231370704.

It is not an unprimeable number, because it can be changed into a prime (231370739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129315 + ... + 131091.

It is an arithmetic number, because the mean of its divisors is an integer number (7904988).

Almost surely, 2^231370731 is an apocalyptic number.

231370731 is a deficient number, since it is larger than the sum of its proper divisors (148068693).

231370731 is a wasteful number, since it uses less digits than its factorization.

231370731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1857 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 27.

The square root of 231370731 is about 15210.8754185944. The cubic root of 231370731 is about 613.9073121696.

The spelling of 231370731 in words is "two hundred thirty-one million, three hundred seventy thousand, seven hundred thirty-one".