31003200331013 has 4 divisors (see below), whose sum is σ = 31351550896620. Its totient is φ = 30654849765408.

The previous prime is 31003200330967. The next prime is 31003200331049. The reversal of 31003200331013 is 31013300230013.

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 3727054191364 + 27276146139649 = 1930558^2 + 5222657^2 .

It is a cyclic number.

It is not a de Polignac number, because 31003200331013 - 2²² = 31003196136709 is a prime.

It is a super-2 number, since 2×31003200331013² (a number of 28 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 (31003200337013) 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, 174175282670 + ... + 174175282847.

It is an arithmetic number, because the mean of its divisors is an integer number (7837887724155).

Almost surely, 2^{31003200331013} is an apocalyptic number.

It is an amenable number.

31003200331013 is a deficient number, since it is larger than the sum of its proper divisors (348350565607).

31003200331013 is an equidigital number, since it uses as much as digits as its factorization.

31003200331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348350565606.

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

Adding to 31003200331013 its reverse (31013300230013), we get a palindrome (62016500561026).

The spelling of 31003200331013 in words is "thirty-one trillion, three billion, two hundred million, three hundred thirty-one thousand, thirteen".