31304640313 has 4 divisors (see below), whose sum is σ = 32032655248. Its totient is φ = 30576625380.

The previous prime is 31304640281. The next prime is 31304640329.

31304640313 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31304640313 - 2⁵ = 31304640281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31304640343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364007403 + ... + 364007488.

It is an arithmetic number, because the mean of its divisors is an integer number (8008163812).

Almost surely, 2^31304640313 is an apocalyptic number.

It is an amenable number.

31304640313 is a deficient number, since it is larger than the sum of its proper divisors (728014935).

31304640313 is an equidigital number, since it uses as much as digits as its factorization.

31304640313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728014934.

The product of its (nonzero) digits is 7776, while the sum is 28.

The spelling of 31304640313 in words is "thirty-one billion, three hundred four million, six hundred forty thousand, three hundred thirteen".