31382225 has 12 divisors (see below), whose sum is σ = 44473344. Its totient is φ = 21519120.

The previous prime is 31382177. The next prime is 31382233. The reversal of 31382225 is 52228313.

It is not a de Polignac number, because 31382225 - 2⁸ = 31381969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31382194 and 31382203.

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, 89489 + ... + 89838.

It is an arithmetic number, because the mean of its divisors is an integer number (3706112).

Almost surely, 2^31382225 is an apocalyptic number.

31382225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31382225 is a deficient number, since it is larger than the sum of its proper divisors (13091119).

31382225 is a wasteful number, since it uses less digits than its factorization.

31382225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179344 (or 179339 counting only the distinct ones).

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

The square root of 31382225 is about 5601.9840235402. The cubic root of 31382225 is about 315.4238855370.

The spelling of 31382225 in words is "thirty-one million, three hundred eighty-two thousand, two hundred twenty-five".