31131032231013 has 32 divisors (see below), whose sum is σ = 48765507366912. Its totient is φ = 17415671544000.

The previous prime is 31131032230997. The next prime is 31131032231023. The reversal of 31131032231013 is 31013223013113.

It is not a de Polignac number, because 31131032231013 - 2⁴ = 31131032230997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31131032231023) 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, 26559288 + ... + 27706638.

It is an arithmetic number, because the mean of its divisors is an integer number (1523922105216).

Almost surely, 2^{31131032231013} is an apocalyptic number.

31131032231013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31131032231013 is a deficient number, since it is larger than the sum of its proper divisors (17634475135899).

31131032231013 is a wasteful number, since it uses less digits than its factorization.

31131032231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210625.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31131032231013 its reverse (31013223013113), we get a palindrome (62144255244126).

The spelling of 31131032231013 in words is "thirty-one trillion, one hundred thirty-one billion, thirty-two million, two hundred thirty-one thousand, thirteen".