31132331313 has 4 divisors (see below), whose sum is σ = 41509775088. Its totient is φ = 20754887540.

The previous prime is 31132331267. The next prime is 31132331323. The reversal of 31132331313 is 31313323113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31132331313 - 2²⁸ = 30863895857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31132331323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5188721883 + ... + 5188721888.

It is an arithmetic number, because the mean of its divisors is an integer number (10377443772).

Almost surely, 2^31132331313 is an apocalyptic number.

It is an amenable number.

31132331313 is a deficient number, since it is larger than the sum of its proper divisors (10377443775).

31132331313 is a wasteful number, since it uses less digits than its factorization.

31132331313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377443774.

The product of its digits is 1458, while the sum is 24.

Adding to 31132331313 its reverse (31313323113), we get a palindrome (62445654426).

The spelling of 31132331313 in words is "thirty-one billion, one hundred thirty-two million, three hundred thirty-one thousand, three hundred thirteen".