231311213002331 has 32 divisors (see below), whose sum is σ = 288643395995136. Its totient is φ = 180082900800000.

The previous prime is 231311213002273. The next prime is 231311213002343. The reversal of 231311213002331 is 133200312113132.

It is not a de Polignac number, because 231311213002331 - 2²² = 231311208808027 is a prime.

It is a super-2 number, since 2×231311213002331² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231311213002331.

It is not an unprimeable number, because it can be changed into a prime (231311213002381) 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, 2113322156 + ... + 2113431606.

It is an arithmetic number, because the mean of its divisors is an integer number (9020106124848).

Almost surely, 2^{231311213002331} is an apocalyptic number.

231311213002331 is a deficient number, since it is larger than the sum of its proper divisors (57332182992805).

231311213002331 is a wasteful number, since it uses less digits than its factorization.

231311213002331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133523.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 231311213002331 its reverse (133200312113132), we get a palindrome (364511525115463).

The spelling of 231311213002331 in words is "two hundred thirty-one trillion, three hundred eleven billion, two hundred thirteen million, two thousand, three hundred thirty-one".