31240341313 has 16 divisors (see below), whose sum is σ = 32596647760. Its totient is φ = 29912841216.

The previous prime is 31240341283. The next prime is 31240341347. The reversal of 31240341313 is 31314304213.

It can be written as a sum of positive squares in 8 ways, for example, as 7686379584 + 23553961729 = 87672^2 + 153473^2 .

It is not a de Polignac number, because 31240341313 - 2⁵ = 31240341281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31240341383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221703 + ... + 1247011.

It is an arithmetic number, because the mean of its divisors is an integer number (2037290485).

Almost surely, 2^31240341313 is an apocalyptic number.

It is an amenable number.

31240341313 is a deficient number, since it is larger than the sum of its proper divisors (1356306447).

31240341313 is a wasteful number, since it uses less digits than its factorization.

31240341313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25876.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 31240341313 its reverse (31314304213), we get a palindrome (62554645526).

The spelling of 31240341313 in words is "thirty-one billion, two hundred forty million, three hundred forty-one thousand, three hundred thirteen".