31331103120313 has 4 divisors (see below), whose sum is σ = 31862138766480. Its totient is φ = 30800067474148.

The previous prime is 31331103120307. The next prime is 31331103120347. The reversal of 31331103120313 is 31302130113313.

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 31331103120313 - 2¹³ = 31331103112121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31331103120413) 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, 265517822995 + ... + 265517823112.

It is an arithmetic number, because the mean of its divisors is an integer number (7965534691620).

Almost surely, 2^{31331103120313} is an apocalyptic number.

It is an amenable number.

31331103120313 is a deficient number, since it is larger than the sum of its proper divisors (531035646167).

31331103120313 is an equidigital number, since it uses as much as digits as its factorization.

31331103120313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531035646166.

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31331103120313 its reverse (31302130113313), we get a palindrome (62633233233626).

The spelling of 31331103120313 in words is "thirty-one trillion, three hundred thirty-one billion, one hundred three million, one hundred twenty thousand, three hundred thirteen".