231314331 has 4 divisors (see below), whose sum is σ = 308419112. Its totient is φ = 154209552.

The previous prime is 231314327. The next prime is 231314339. The reversal of 231314331 is 133413132.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231314331 - 2² = 231314327 is a prime.

It is a super-2 number, since 2×231314331² = 107012639451955122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231314298 and 231314307.

It is not an unprimeable number, because it can be changed into a prime (231314339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38552386 + ... + 38552391.

It is an arithmetic number, because the mean of its divisors is an integer number (77104778).

Almost surely, 2^231314331 is an apocalyptic number.

231314331 is a deficient number, since it is larger than the sum of its proper divisors (77104781).

231314331 is an equidigital number, since it uses as much as digits as its factorization.

231314331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77104780.

The product of its digits is 648, while the sum is 21.

The square root of 231314331 is about 15209.0213689113. The cubic root of 231314331 is about 613.8574251535.

Adding to 231314331 its reverse (133413132), we get a palindrome (364727463).

The spelling of 231314331 in words is "two hundred thirty-one million, three hundred fourteen thousand, three hundred thirty-one".