31331132011313 has 4 divisors (see below), whose sum is σ = 31331378779968. Its totient is φ = 31330885242660.

The previous prime is 31331132011141. The next prime is 31331132011351. The reversal of 31331132011313 is 31311023113313.

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 31331132011313 - 2⁸ = 31331132011057 is a prime.

It is a super-2 number, since 2×31331132011313² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331132011813) 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, 123193781 + ... + 123447842.

It is an arithmetic number, because the mean of its divisors is an integer number (7832844694992).

Almost surely, 2^{31331132011313} is an apocalyptic number.

It is an amenable number.

31331132011313 is a deficient number, since it is larger than the sum of its proper divisors (246768655).

31331132011313 is a wasteful number, since it uses less digits than its factorization.

31331132011313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246768654.

The product of its (nonzero) digits is 1458, while the sum is 26.

Adding to 31331132011313 its reverse (31311023113313), we get a palindrome (62642155124626).

The spelling of 31331132011313 in words is "thirty-one trillion, three hundred thirty-one billion, one hundred thirty-two million, eleven thousand, three hundred thirteen".