31031303310989 has 4 divisors (see below), whose sum is σ = 31044570223680. Its totient is φ = 31018036398300.

The previous prime is 31031303310979. The next prime is 31031303311003. The reversal of 31031303310989 is 98901330313013.

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 31031303310989 - 2²⁰ = 31031302262413 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 (31031303310979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6633452837 + ... + 6633457514.

It is an arithmetic number, because the mean of its divisors is an integer number (7761142555920).

Almost surely, 2^{31031303310989} is an apocalyptic number.

It is an amenable number.

31031303310989 is a deficient number, since it is larger than the sum of its proper divisors (13266912691).

31031303310989 is a wasteful number, since it uses less digits than its factorization.

31031303310989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13266912690.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 31031303310989 in words is "thirty-one trillion, thirty-one billion, three hundred three million, three hundred ten thousand, nine hundred eighty-nine".