31775225 has 12 divisors (see below), whose sum is σ = 39846780. Its totient is φ = 25132800.

The previous prime is 31775197. The next prime is 31775231. The reversal of 31775225 is 52257713.

It can be written as a sum of positive squares in 6 ways, for example, as 13017664 + 18757561 = 3608^2 + 4331^2 .

It is not a de Polignac number, because 31775225 - 2²² = 27580921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31775191 and 31775200.

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, 4916 + ... + 9365.

It is an arithmetic number, because the mean of its divisors is an integer number (3320565).

Almost surely, 2^31775225 is an apocalyptic number.

It is an amenable number.

31775225 is a deficient number, since it is larger than the sum of its proper divisors (8071555).

31775225 is a wasteful number, since it uses less digits than its factorization.

31775225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14380 (or 14375 counting only the distinct ones).

The product of its digits is 14700, while the sum is 32.

The square root of 31775225 is about 5636.9517471768. The cubic root of 31775225 is about 316.7351129361.

The spelling of 31775225 in words is "thirty-one million, seven hundred seventy-five thousand, two hundred twenty-five".