30031250 has 42 divisors (see below), whose sum is σ = 58182849. Its totient is φ = 11625000.

The previous prime is 30031249. The next prime is 30031259. The reversal of 30031250 is 5213003.

It can be written as a sum of positive squares in 4 ways, for example, as 5121169 + 24910081 = 2263^2 + 4991^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3875.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30031259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 968735 + ... + 968765.

Almost surely, 2^30031250 is an apocalyptic number.

30031250 is a deficient number, since it is larger than the sum of its proper divisors (28151599).

30031250 is an frugal number, since it uses more digits than its factorization.

30031250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 30031250 is about 5480.0775541957. The cubic root of 30031250 is about 310.8311031728.

Adding to 30031250 its reverse (5213003), we get a palindrome (35244253).

The spelling of 30031250 in words is "thirty million, thirty-one thousand, two hundred fifty".