31713212225 has 12 divisors (see below), whose sum is σ = 39969047100. Its totient is φ = 24954657600.

The previous prime is 31713212213. The next prime is 31713212239. The reversal of 31713212225 is 52221231713.

It can be written as a sum of positive squares in 6 ways, for example, as 310182544 + 31403029681 = 17612^2 + 177209^2 .

It is not a de Polignac number, because 31713212225 - 2⁶ = 31713212161 is a prime.

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, 10396250 + ... + 10399299.

It is an arithmetic number, because the mean of its divisors is an integer number (3330753925).

Almost surely, 2^31713212225 is an apocalyptic number.

It is an amenable number.

31713212225 is a deficient number, since it is larger than the sum of its proper divisors (8255834875).

31713212225 is a wasteful number, since it uses less digits than its factorization.

31713212225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20795620 (or 20795615 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

Adding to 31713212225 its reverse (52221231713), we get a palindrome (83934443938).

The spelling of 31713212225 in words is "thirty-one billion, seven hundred thirteen million, two hundred twelve thousand, two hundred twenty-five".