31007245717 has 6 divisors (see below), whose sum is σ = 36069653238. Its totient is φ = 26577639144.

The previous prime is 31007245669. The next prime is 31007245747. The reversal of 31007245717 is 71754270013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22931347761 + 8075897956 = 151431^2 + 89866^2 .

It is not a de Polignac number, because 31007245717 - 2⁷ = 31007245589 is a prime.

It is a super-2 number, since 2×31007245717² (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 (31007245747) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316400418 + ... + 316400515.

It is an arithmetic number, because the mean of its divisors is an integer number (6011608873).

Almost surely, 2^31007245717 is an apocalyptic number.

It is an amenable number.

31007245717 is a deficient number, since it is larger than the sum of its proper divisors (5062407521).

31007245717 is an equidigital number, since it uses as much as digits as its factorization.

31007245717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632800947 (or 632800940 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 37.

The spelling of 31007245717 in words is "thirty-one billion, seven million, two hundred forty-five thousand, seven hundred seventeen".