31002645413 has 4 divisors (see below), whose sum is σ = 31046872428. Its totient is φ = 30958418400.

The previous prime is 31002645383. The next prime is 31002645437. The reversal of 31002645413 is 31454620013.

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 24330696289 + 6671949124 = 155983^2 + 81682^2 .

It is a cyclic number.

It is not a de Polignac number, because 31002645413 - 2²⁰ = 31001596837 is a prime.

It is a super-2 number, since 2×31002645413² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31002645613) 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, 22112456 + ... + 22113857.

It is an arithmetic number, because the mean of its divisors is an integer number (7761718107).

Almost surely, 2^31002645413 is an apocalyptic number.

It is an amenable number.

31002645413 is a deficient number, since it is larger than the sum of its proper divisors (44227015).

31002645413 is an equidigital number, since it uses as much as digits as its factorization.

31002645413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44227014.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 31002645413 in words is "thirty-one billion, two million, six hundred forty-five thousand, four hundred thirteen".