31194225 has 18 divisors (see below), whose sum is σ = 55872726. Its totient is φ = 16636800.

The previous prime is 31194217. The next prime is 31194239. The reversal of 31194225 is 52249113.

It can be written as a sum of positive squares in 3 ways, for example, as 24336 + 31169889 = 156^2 + 5583^2 .

It is not a de Polignac number, because 31194225 - 2³ = 31194217 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 69096 + ... + 69545.

Almost surely, 2^31194225 is an apocalyptic number.

It is an amenable number.

31194225 is a deficient number, since it is larger than the sum of its proper divisors (24678501).

31194225 is a wasteful number, since it uses less digits than its factorization.

31194225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138657 (or 138649 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 31194225 is about 5585.1790481595. The cubic root of 31194225 is about 314.7927586197.

The spelling of 31194225 in words is "thirty-one million, one hundred ninety-four thousand, two hundred twenty-five".