30906225 has 96 divisors (see below), whose sum is σ = 67297280. Its totient is φ = 13608000.

The previous prime is 30906223. The next prime is 30906263. The reversal of 30906225 is 52260903.

30906225 is a `hidden beast` number, since 30 + 9 + 0 + 622 + 5 = 666.

It is not a de Polignac number, because 30906225 - 2¹ = 30906223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30906223) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 146370 + ... + 146580.

Almost surely, 2^30906225 is an apocalyptic number.

30906225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30906225 is an abundant number, since it is smaller than the sum of its proper divisors (36391055).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30906225 is a wasteful number, since it uses less digits than its factorization.

30906225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 30906225 is about 5559.3367410151. The cubic root of 30906225 is about 313.8209894233.

The spelling of 30906225 in words is "thirty million, nine hundred six thousand, two hundred twenty-five".