31013313313 has 4 divisors (see below), whose sum is σ = 32082737940. Its totient is φ = 29943888688.

The previous prime is 31013313307. The next prime is 31013313319. The reversal of 31013313313 is 31331331013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31331331013 = 25411 ⋅1232983.

It is an interprime number because it is at equal distance from previous prime (31013313307) and next prime (31013313319).

It can be written as a sum of positive squares in 2 ways, for example, as 24444697104 + 6568616209 = 156348^2 + 81047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31013313313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31013313319) 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, 534712270 + ... + 534712327.

It is an arithmetic number, because the mean of its divisors is an integer number (8020684485).

Almost surely, 2^31013313313 is an apocalyptic number.

It is an amenable number.

31013313313 is a deficient number, since it is larger than the sum of its proper divisors (1069424627).

31013313313 is a wasteful number, since it uses less digits than its factorization.

31013313313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069424626.

The product of its (nonzero) digits is 729, while the sum is 22.

Adding to 31013313313 its reverse (31331331013), we get a palindrome (62344644326).

It can be divided in two parts, 3101331 and 3313, that added together give a square (3104644 = 1762²).

The spelling of 31013313313 in words is "thirty-one billion, thirteen million, three hundred thirteen thousand, three hundred thirteen".