31225489684 has 6 divisors (see below), whose sum is σ = 54644606954. Its totient is φ = 15612744840.

The previous prime is 31225489681. The next prime is 31225489693. The reversal of 31225489684 is 48698452213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25930016784 + 5295472900 = 161028^2 + 72770^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31225489681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3903186207 + ... + 3903186214.

Almost surely, 2^31225489684 is an apocalyptic number.

It is an amenable number.

31225489684 is a deficient number, since it is larger than the sum of its proper divisors (23419117270).

31225489684 is a wasteful number, since it uses less digits than its factorization.

31225489684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7806372425 (or 7806372423 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The spelling of 31225489684 in words is "thirty-one billion, two hundred twenty-five million, four hundred eighty-nine thousand, six hundred eighty-four".