31283225 has 6 divisors (see below), whose sum is σ = 38791230. Its totient is φ = 25026560.

The previous prime is 31283191. The next prime is 31283227. The reversal of 31283225 is 52238213.

It can be written as a sum of positive squares in 3 ways, for example, as 1646089 + 29637136 = 1283^2 + 5444^2 .

It is not a de Polignac number, because 31283225 - 2⁸ = 31282969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31283194 and 31283203.

It is not an unprimeable number, because it can be changed into a prime (31283227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 625640 + ... + 625689.

It is an arithmetic number, because the mean of its divisors is an integer number (6465205).

Almost surely, 2^31283225 is an apocalyptic number.

It is an amenable number.

31283225 is a deficient number, since it is larger than the sum of its proper divisors (7508005).

31283225 is a wasteful number, since it uses less digits than its factorization.

31283225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251339 (or 1251334 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 31283225 is about 5593.1408886242. The cubic root of 31283225 is about 315.0918519408.

The spelling of 31283225 in words is "thirty-one million, two hundred eighty-three thousand, two hundred twenty-five".