30813625 has 8 divisors (see below), whose sum is σ = 38455560. Its totient is φ = 24650800.

The previous prime is 30813613. The next prime is 30813641. The reversal of 30813625 is 52631803.

It can be written as a sum of positive squares in 4 ways, for example, as 5683456 + 25130169 = 2384^2 + 5013^2 .

It is not a de Polignac number, because 30813625 - 2⁵ = 30813593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30813593 and 30813602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123130 + ... + 123379.

It is an arithmetic number, because the mean of its divisors is an integer number (4806945).

Almost surely, 2^30813625 is an apocalyptic number.

It is an amenable number.

30813625 is a deficient number, since it is larger than the sum of its proper divisors (7641935).

30813625 is an equidigital number, since it uses as much as digits as its factorization.

30813625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246524 (or 246514 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 30813625 is about 5551.0021617722. The cubic root of 30813625 is about 313.5072565679.

The spelling of 30813625 in words is "thirty million, eight hundred thirteen thousand, six hundred twenty-five".