30931425 has 72 divisors (see below), whose sum is σ = 64995840. Its totient is φ = 13766400.

The previous prime is 30931393. The next prime is 30931451. The reversal of 30931425 is 52413903.

It is not a de Polignac number, because 30931425 - 2⁵ = 30931393 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 64336 + ... + 64814.

It is an arithmetic number, because the mean of its divisors is an integer number (902720).

Almost surely, 2^30931425 is an apocalyptic number.

30931425 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30931425 is an abundant number, since it is smaller than the sum of its proper divisors (34064415).

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

30931425 is a wasteful number, since it uses less digits than its factorization.

30931425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 535 counting only the distinct ones).

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

The square root of 30931425 is about 5561.6027366219. The cubic root of 30931425 is about 313.9062596293.

The spelling of 30931425 in words is "thirty million, nine hundred thirty-one thousand, four hundred twenty-five".