30512925 has 18 divisors (see below), whose sum is σ = 54652442. Its totient is φ = 16273440.

The previous prime is 30512899. The next prime is 30512957. The reversal of 30512925 is 52921503.

It can be written as a sum of positive squares in 3 ways, for example, as 6365529 + 24147396 = 2523^2 + 4914^2 .

It is not a de Polignac number, because 30512925 - 2⁶ = 30512861 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 67582 + ... + 68031.

Almost surely, 2^30512925 is an apocalyptic number.

It is an amenable number.

30512925 is a deficient number, since it is larger than the sum of its proper divisors (24139517).

30512925 is a wasteful number, since it uses less digits than its factorization.

30512925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135629 (or 135621 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 30512925 is about 5523.8505591661. The cubic root of 30512925 is about 312.4841165260.

The spelling of 30512925 in words is "thirty million, five hundred twelve thousand, nine hundred twenty-five".