31671163225 has 24 divisors (see below), whose sum is σ = 42428442392. Its totient is φ = 23313139200.

The previous prime is 31671163207. The next prime is 31671163309. The reversal of 31671163225 is 52236117613.

It can be written as a sum of positive squares in 12 ways, for example, as 19356600384 + 12314562841 = 139128^2 + 110971^2 .

It is not a de Polignac number, because 31671163225 - 2⁹ = 31671162713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53946 + ... + 257395.

Almost surely, 2^31671163225 is an apocalyptic number.

It is an amenable number.

31671163225 is a deficient number, since it is larger than the sum of its proper divisors (10757279167).

31671163225 is a wasteful number, since it uses less digits than its factorization.

31671163225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311677 (or 311672 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The spelling of 31671163225 in words is "thirty-one billion, six hundred seventy-one million, one hundred sixty-three thousand, two hundred twenty-five".