231077931 has 8 divisors (see below), whose sum is σ = 352118784. Its totient is φ = 132044520.

The previous prime is 231077921. The next prime is 231077939. The reversal of 231077931 is 139770132.

It is a happy number.

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

It is not a de Polignac number, because 231077931 - 2¹⁰ = 231076907 is a prime.

It is a super-2 number, since 2×231077931² = 106794020390481522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231077892 and 231077901.

It is not an unprimeable number, because it can be changed into a prime (231077939) 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, 5501835 + ... + 5501876.

It is an arithmetic number, because the mean of its divisors is an integer number (44014848).

Almost surely, 2^231077931 is an apocalyptic number.

231077931 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231077931 is a deficient number, since it is larger than the sum of its proper divisors (121040853).

231077931 is a wasteful number, since it uses less digits than its factorization.

231077931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11003721.

The product of its (nonzero) digits is 7938, while the sum is 33.

The square root of 231077931 is about 15201.2476790558. The cubic root of 231077931 is about 613.6482359833.

The spelling of 231077931 in words is "two hundred thirty-one million, seventy-seven thousand, nine hundred thirty-one".