31303202313 has 4 divisors (see below), whose sum is σ = 41737603088. Its totient is φ = 20868801540.

The previous prime is 31303202291. The next prime is 31303202321. The reversal of 31303202313 is 31320230313.

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 not a de Polignac number, because 31303202313 - 2¹⁸ = 31302940169 is a prime.

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 31303202313.

It is not an unprimeable number, because it can be changed into a prime (31303202813) 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 3 ways as a sum of consecutive naturals, for example, 5217200383 + ... + 5217200388.

It is an arithmetic number, because the mean of its divisors is an integer number (10434400772).

Almost surely, 2^31303202313 is an apocalyptic number.

It is an amenable number.

31303202313 is a deficient number, since it is larger than the sum of its proper divisors (10434400775).

31303202313 is a wasteful number, since it uses less digits than its factorization.

31303202313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10434400774.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31303202313 its reverse (31320230313), we get a palindrome (62623432626).

The spelling of 31303202313 in words is "thirty-one billion, three hundred three million, two hundred two thousand, three hundred thirteen".