31262225 has 12 divisors (see below), whose sum is σ = 39814044. Its totient is φ = 24333120.

The previous prime is 31262219. The next prime is 31262281. The reversal of 31262225 is 52226213.

It can be written as a sum of positive squares in 6 ways, for example, as 36481 + 31225744 = 191^2 + 5588^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31262225 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31262225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15974 + ... + 17823.

It is an arithmetic number, because the mean of its divisors is an integer number (3317837).

Almost surely, 2^31262225 is an apocalyptic number.

It is an amenable number.

31262225 is a deficient number, since it is larger than the sum of its proper divisors (8551819).

31262225 is a wasteful number, since it uses less digits than its factorization.

31262225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33844 (or 33839 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 31262225 is about 5591.2632740732. The cubic root of 31262225 is about 315.0213305451.

Adding to 31262225 its reverse (52226213), we get a palindrome (83488438).

The spelling of 31262225 in words is "thirty-one million, two hundred sixty-two thousand, two hundred twenty-five".