31363474257 has 24 divisors (see below), whose sum is σ = 45504962568. Its totient is φ = 20815872000.

The previous prime is 31363474217. The next prime is 31363474271. The reversal of 31363474257 is 75247436313.

31363474257 is a `hidden beast` number, since 3 + 1 + 3 + 634 + 7 + 4 + 2 + 5 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 20214014976 + 11149459281 = 142176^2 + 105591^2 .

It is not a de Polignac number, because 31363474257 - 2⁸ = 31363474001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31363474217) 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 23 ways as a sum of consecutive naturals, for example, 2028757 + ... + 2044157.

It is an arithmetic number, because the mean of its divisors is an integer number (1896040107).

Almost surely, 2^31363474257 is an apocalyptic number.

It is an amenable number.

31363474257 is a deficient number, since it is larger than the sum of its proper divisors (14141488311).

31363474257 is a wasteful number, since it uses less digits than its factorization.

31363474257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16401 (or 16398 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 45.

The spelling of 31363474257 in words is "thirty-one billion, three hundred sixty-three million, four hundred seventy-four thousand, two hundred fifty-seven".