31456225 has 12 divisors (see below), whose sum is σ = 39958380. Its totient is φ = 24550400.

The previous prime is 31456219. The next prime is 31456237. The reversal of 31456225 is 52265413.

It can be written as a sum of positive squares in 6 ways, for example, as 185761 + 31270464 = 431^2 + 5592^2 .

It is not a de Polignac number, because 31456225 - 2⁵ = 31456193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31456193 and 31456202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14320 + ... + 16369.

It is an arithmetic number, because the mean of its divisors is an integer number (3329865).

Almost surely, 2^31456225 is an apocalyptic number.

It is an amenable number.

31456225 is a deficient number, since it is larger than the sum of its proper divisors (8502155).

31456225 is a wasteful number, since it uses less digits than its factorization.

31456225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30740 (or 30735 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 31456225 is about 5608.5849373973. The cubic root of 31456225 is about 315.6716164849.

The spelling of 31456225 in words is "thirty-one million, four hundred fifty-six thousand, two hundred twenty-five".