31319689225 has 12 divisors (see below), whose sum is σ = 42366998160. Its totient is φ = 22777955600.

The previous prime is 31319689201. The next prime is 31319689241. The reversal of 31319689225 is 52298691313.

It is not a de Polignac number, because 31319689225 - 2⁷ = 31319689097 is a prime.

It is a super-2 number, since 2×31319689225² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56944615 + ... + 56945164.

It is an arithmetic number, because the mean of its divisors is an integer number (3530583180).

Almost surely, 2^31319689225 is an apocalyptic number.

It is an amenable number.

31319689225 is a deficient number, since it is larger than the sum of its proper divisors (11047308935).

31319689225 is a wasteful number, since it uses less digits than its factorization.

31319689225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113889800 (or 113889795 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The spelling of 31319689225 in words is "thirty-one billion, three hundred nineteen million, six hundred eighty-nine thousand, two hundred twenty-five".