31312497225 has 24 divisors (see below), whose sum is σ = 52282582272. Its totient is φ = 16534648000.

The previous prime is 31312497197. The next prime is 31312497241. The reversal of 31312497225 is 52279421313.

It is a happy number.

It is not a de Polignac number, because 31312497225 - 2⁹ = 31312496713 is a prime.

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, 2059257 + ... + 2074406.

It is an arithmetic number, because the mean of its divisors is an integer number (2178440928).

Almost surely, 2^31312497225 is an apocalyptic number.

It is an amenable number.

31312497225 is a deficient number, since it is larger than the sum of its proper divisors (20970085047).

31312497225 is a wasteful number, since it uses less digits than its factorization.

31312497225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4133777 (or 4133772 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The spelling of 31312497225 in words is "thirty-one billion, three hundred twelve million, four hundred ninety-seven thousand, two hundred twenty-five".