31405540501231 has 24 divisors (see below), whose sum is σ = 34096267785600. Its totient is φ = 28913883616800.

The previous prime is 31405540501219. The next prime is 31405540501319. The reversal of 31405540501231 is 13210504550413.

It is not a de Polignac number, because 31405540501231 - 2²⁵ = 31405506946799 is a prime.

It is a super-2 number, since 2×31405540501231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31405540501211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103394820 + ... + 103698118.

It is an arithmetic number, because the mean of its divisors is an integer number (1420677824400).

Almost surely, 2^{31405540501231} is an apocalyptic number.

31405540501231 is a deficient number, since it is larger than the sum of its proper divisors (2690727284369).

31405540501231 is a wasteful number, since it uses less digits than its factorization.

31405540501231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304927 (or 304914 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 31405540501231 in words is "thirty-one trillion, four hundred five billion, five hundred forty million, five hundred one thousand, two hundred thirty-one".