31531413513 has 16 divisors (see below), whose sum is σ = 42466738752. Its totient is φ = 20808600000.

The previous prime is 31531413491. The next prime is 31531413517.

31531413513 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31531413513 - 2⁵ = 31531413481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31531413517) 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 15 ways as a sum of consecutive naturals, for example, 2387418 + ... + 2400588.

It is an arithmetic number, because the mean of its divisors is an integer number (2654171172).

Almost surely, 2^31531413513 is an apocalyptic number.

It is an amenable number.

31531413513 is a deficient number, since it is larger than the sum of its proper divisors (10935325239).

31531413513 is a wasteful number, since it uses less digits than its factorization.

31531413513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21176.

The product of its digits is 8100, while the sum is 30.

The spelling of 31531413513 in words is "thirty-one billion, five hundred thirty-one million, four hundred thirteen thousand, five hundred thirteen".