31314446513 has 6 divisors (see below), whose sum is σ = 36427009266. Its totient is φ = 26840954112.

The previous prime is 31314446507. The next prime is 31314446519. The reversal of 31314446513 is 31564441313.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31314446507) and next prime (31314446519).

It can be written as a sum of positive squares in only one way, i.e., 18831523984 + 12482922529 = 137228^2 + 111727^2 .

It is not a de Polignac number, because 31314446513 - 2¹⁰ = 31314445489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31314446519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 319535120 + ... + 319535217.

It is an arithmetic number, because the mean of its divisors is an integer number (6071168211).

Almost surely, 2^31314446513 is an apocalyptic number.

It is an amenable number.

31314446513 is a deficient number, since it is larger than the sum of its proper divisors (5112562753).

31314446513 is an equidigital number, since it uses as much as digits as its factorization.

31314446513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639070351 (or 639070344 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

Adding to 31314446513 its reverse (31564441313), we get a palindrome (62878887826).

The spelling of 31314446513 in words is "thirty-one billion, three hundred fourteen million, four hundred forty-six thousand, five hundred thirteen".