30975225 has 24 divisors (see below), whose sum is σ = 53910240. Its totient is φ = 15649920.

The previous prime is 30975223. The next prime is 30975229. The reversal of 30975225 is 52257903.

It is not a de Polignac number, because 30975225 - 2¹ = 30975223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30975223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9444 + ... + 12293.

It is an arithmetic number, because the mean of its divisors is an integer number (2246260).

Almost surely, 2^30975225 is an apocalyptic number.

It is an amenable number.

30975225 is a deficient number, since it is larger than the sum of its proper divisors (22935015).

30975225 is a wasteful number, since it uses less digits than its factorization.

30975225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21769 (or 21764 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 30975225 is about 5565.5390574499. The cubic root of 30975225 is about 314.0543572305.

The spelling of 30975225 in words is "thirty million, nine hundred seventy-five thousand, two hundred twenty-five".