31323001313 has 16 divisors (see below), whose sum is σ = 33949238400. Its totient is φ = 28784345856.

The previous prime is 31323001309. The next prime is 31323001321. The reversal of 31323001313 is 31310032313.

It is not a de Polignac number, because 31323001313 - 2² = 31323001309 is a prime.

It is a super-2 number, since 2×31323001313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31323001373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2572163 + ... + 2584311.

It is an arithmetic number, because the mean of its divisors is an integer number (2121827400).

Almost surely, 2^31323001313 is an apocalyptic number.

It is an amenable number.

31323001313 is a deficient number, since it is larger than the sum of its proper divisors (2626237087).

31323001313 is a wasteful number, since it uses less digits than its factorization.

31323001313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15736.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31323001313 its reverse (31310032313), we get a palindrome (62633033626).

The spelling of 31323001313 in words is "thirty-one billion, three hundred twenty-three million, one thousand, three hundred thirteen".