31523322509 has 16 divisors (see below), whose sum is σ = 37343760000. Its totient is φ = 26035902144.

The previous prime is 31523322491. The next prime is 31523322511. The reversal of 31523322509 is 90522332513.

It is a de Polignac number, because none of the positive numbers 2^k-31523322509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31523322559) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 54302 + ... + 256895.

It is an arithmetic number, because the mean of its divisors is an integer number (2333985000).

Almost surely, 2^31523322509 is an apocalyptic number.

It is an amenable number.

31523322509 is a deficient number, since it is larger than the sum of its proper divisors (5820437491).

31523322509 is a wasteful number, since it uses less digits than its factorization.

31523322509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311732.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 31523322509 in words is "thirty-one billion, five hundred twenty-three million, three hundred twenty-two thousand, five hundred nine".