31591427522 has 18 divisors (see below), whose sum is σ = 50345399403. Its totient is φ = 14864543232.

The previous prime is 31591427489. The next prime is 31591427531. The reversal of 31591427522 is 22572419513.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 13409871601 + 18181555921 = 115801^2 + 134839^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=125681.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31591427522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4269458 + ... + 4276850.

Almost surely, 2^31591427522 is an apocalyptic number.

31591427522 is a deficient number, since it is larger than the sum of its proper divisors (18753971881).

31591427522 is an frugal number, since it uses more digits than its factorization.

31591427522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14822 (or 7412 counting only the distinct ones).

The product of its digits is 151200, while the sum is 41.

The spelling of 31591427522 in words is "thirty-one billion, five hundred ninety-one million, four hundred twenty-seven thousand, five hundred twenty-two".