31302120232313 has 32 divisors (see below), whose sum is σ = 39339787069440. Its totient is φ = 24284749104000.

The previous prime is 31302120232301. The next prime is 31302120232319. The reversal of 31302120232313 is 31323202120313.

It is not a de Polignac number, because 31302120232313 - 2²² = 31302116038009 is a prime.

It is a super-2 number, since 2×31302120232313² (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 (31302120232319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3348563 + ... + 8591688.

It is an arithmetic number, because the mean of its divisors is an integer number (1229368345920).

Almost surely, 2^{31302120232313} is an apocalyptic number.

It is an amenable number.

31302120232313 is a deficient number, since it is larger than the sum of its proper divisors (8037666837127).

31302120232313 is a wasteful number, since it uses less digits than its factorization.

31302120232313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11941157.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31302120232313 its reverse (31323202120313), we get a palindrome (62625322352626).

The spelling of 31302120232313 in words is "thirty-one trillion, three hundred two billion, one hundred twenty million, two hundred thirty-two thousand, three hundred thirteen".