231323331 has 16 divisors (see below), whose sum is σ = 315532800. Its totient is φ = 150676128.

The previous prime is 231323321. The next prime is 231323341. The reversal of 231323331 is 133323132.

It is an interprime number because it is at equal distance from previous prime (231323321) and next prime (231323341).

It is not a de Polignac number, because 231323331 - 2⁵ = 231323299 is a prime.

It is a super-2 number, since 2×231323331² = 107020966929871122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231323298 and 231323307.

It is not an unprimeable number, because it can be changed into a prime (231323321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115900 + ... + 117878.

It is an arithmetic number, because the mean of its divisors is an integer number (19720800).

Almost surely, 2^231323331 is an apocalyptic number.

231323331 is a deficient number, since it is larger than the sum of its proper divisors (84209469).

231323331 is a wasteful number, since it uses less digits than its factorization.

231323331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858.

The product of its digits is 972, while the sum is 21.

The square root of 231323331 is about 15209.3172430586. The cubic root of 231323331 is about 613.8653863913.

Adding to 231323331 its reverse (133323132), we get a palindrome (364646463).

The spelling of 231323331 in words is "two hundred thirty-one million, three hundred twenty-three thousand, three hundred thirty-one".