31313413231 has 8 divisors (see below), whose sum is σ = 31347290304. Its totient is φ = 31279557120.

The previous prime is 31313413217. The next prime is 31313413247. The reversal of 31313413231 is 13231431313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31313413231 - 2⁵ = 31313413199 is a prime.

It is a super-2 number, since 2×31313413231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313413196 and 31313413205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313413331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6863191 + ... + 6867751.

It is an arithmetic number, because the mean of its divisors is an integer number (3918411288).

Almost surely, 2^31313413231 is an apocalyptic number.

31313413231 is a deficient number, since it is larger than the sum of its proper divisors (33877073).

31313413231 is a wasteful number, since it uses less digits than its factorization.

31313413231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10481.

The product of its digits is 1944, while the sum is 25.

Adding to 31313413231 its reverse (13231431313), we get a palindrome (44544844544).

The spelling of 31313413231 in words is "thirty-one billion, three hundred thirteen million, four hundred thirteen thousand, two hundred thirty-one".