31386621107 has 4 divisors (see below), whose sum is σ = 31399996536. Its totient is φ = 31373245680.

The previous prime is 31386621083. The next prime is 31386621179. The reversal of 31386621107 is 70112668313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31386621107 - 2⁶ = 31386621043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31386621187) 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, 6684194 + ... + 6688887.

It is an arithmetic number, because the mean of its divisors is an integer number (7849999134).

Almost surely, 2^31386621107 is an apocalyptic number.

31386621107 is a deficient number, since it is larger than the sum of its proper divisors (13375429).

31386621107 is a wasteful number, since it uses less digits than its factorization.

31386621107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13375428.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 31386621107 in words is "thirty-one billion, three hundred eighty-six million, six hundred twenty-one thousand, one hundred seven".