31199910013 has 4 divisors (see below), whose sum is σ = 32842010560. Its totient is φ = 29557809468.

The previous prime is 31199909987. The next prime is 31199910017. The reversal of 31199910013 is 31001999113.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31001999113 = 22699 ⋅1365787.

It is a cyclic number.

It is not a de Polignac number, because 31199910013 - 2²⁹ = 30663039101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31199910017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821050245 + ... + 821050282.

It is an arithmetic number, because the mean of its divisors is an integer number (8210502640).

Almost surely, 2^31199910013 is an apocalyptic number.

It is an amenable number.

31199910013 is a deficient number, since it is larger than the sum of its proper divisors (1642100547).

31199910013 is a wasteful number, since it uses less digits than its factorization.

31199910013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642100546.

The product of its (nonzero) digits is 6561, while the sum is 37.

It can be divided in two parts, 311999100 and 13, that added together give a palindrome (311999113).

The spelling of 31199910013 in words is "thirty-one billion, one hundred ninety-nine million, nine hundred ten thousand, thirteen".