31022022013 has 4 divisors (see below), whose sum is σ = 32091746940. Its totient is φ = 29952297088.

The previous prime is 31022022007. The next prime is 31022022023.

31022022013 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9071229049 + 21950792964 = 95243^2 + 148158^2 .

It is a cyclic number.

It is not a de Polignac number, because 31022022013 - 2¹³ = 31022013821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022022023) 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, 534862420 + ... + 534862477.

It is an arithmetic number, because the mean of its divisors is an integer number (8022936735).

Almost surely, 2^31022022013 is an apocalyptic number.

It is an amenable number.

31022022013 is a deficient number, since it is larger than the sum of its proper divisors (1069724927).

31022022013 is a wasteful number, since it uses less digits than its factorization.

31022022013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069724926.

The product of its (nonzero) digits is 144, while the sum is 16.

It can be divided in two parts, 310220 and 22013, that added together give a palindrome (332233).

The spelling of 31022022013 in words is "thirty-one billion, twenty-two million, twenty-two thousand, thirteen".