31394225 has 12 divisors (see below), whose sum is σ = 39276876. Its totient is φ = 24890880.

The previous prime is 31394221. The next prime is 31394249. The reversal of 31394225 is 52249313.

It can be written as a sum of positive squares in 6 ways, for example, as 17007376 + 14386849 = 4124^2 + 3793^2 .

It is not a de Polignac number, because 31394225 - 2² = 31394221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31394221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2732 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (3273073).

Almost surely, 2^31394225 is an apocalyptic number.

It is an amenable number.

31394225 is a deficient number, since it is larger than the sum of its proper divisors (7882651).

31394225 is a wasteful number, since it uses less digits than its factorization.

31394225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11236 (or 11231 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 31394225 is about 5603.0549702818. The cubic root of 31394225 is about 315.4640845592.

The spelling of 31394225 in words is "thirty-one million, three hundred ninety-four thousand, two hundred twenty-five".