31312312131 has 8 divisors (see below), whose sum is σ = 41758596880. Its totient is φ = 20870451072.

The previous prime is 31312312093. The next prime is 31312312139. The reversal of 31312312131 is 13121321313.

It is a happy number.

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

It is not a de Polignac number, because 31312312131 - 2⁶ = 31312312067 is a prime.

It is a super-2 number, since 2×31312312131² (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 = 31312312098 and 31312312107.

It is not an unprimeable number, because it can be changed into a prime (31312312139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089370 + ... + 1117743.

It is an arithmetic number, because the mean of its divisors is an integer number (5219824610).

Almost surely, 2^31312312131 is an apocalyptic number.

31312312131 is a deficient number, since it is larger than the sum of its proper divisors (10446284749).

31312312131 is a wasteful number, since it uses less digits than its factorization.

31312312131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211845.

The product of its digits is 324, while the sum is 21.

Adding to 31312312131 its reverse (13121321313), we get a palindrome (44433633444).

The spelling of 31312312131 in words is "thirty-one billion, three hundred twelve million, three hundred twelve thousand, one hundred thirty-one".