231311022033 has 32 divisors (see below), whose sum is σ = 379659943936. Its totient is φ = 121986865728.

The previous prime is 231311022013. The next prime is 231311022037. The reversal of 231311022033 is 330220113132.

It is not a de Polignac number, because 231311022033 - 2¹⁶ = 231310956497 is a prime.

It is a super-2 number, since 2×231311022033² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (231311022037) 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, 1397760 + ... + 1554462.

It is an arithmetic number, because the mean of its divisors is an integer number (11864373248).

Almost surely, 2^231311022033 is an apocalyptic number.

It is an amenable number.

231311022033 is a deficient number, since it is larger than the sum of its proper divisors (148348921903).

231311022033 is a wasteful number, since it uses less digits than its factorization.

231311022033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162133.

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

Adding to 231311022033 its reverse (330220113132), we get a palindrome (561531135165).

The spelling of 231311022033 in words is "two hundred thirty-one billion, three hundred eleven million, twenty-two thousand, thirty-three".