30503530 has 16 divisors (see below), whose sum is σ = 55258920. Its totient is φ = 12123072.

The previous prime is 30503527. The next prime is 30503573. The reversal of 30503530 is 3530503.

It is a Cunningham number, because it is equal to 5523²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 10975969 + 19527561 = 3313^2 + 4419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30503498 and 30503507.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8145 + ... + 11284.

Almost surely, 2^30503530 is an apocalyptic number.

30503530 is a deficient number, since it is larger than the sum of its proper divisors (24755390).

30503530 is a wasteful number, since it uses less digits than its factorization.

30503530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19593.

The product of its (nonzero) digits is 675, while the sum is 19.

The square root of 30503530 is about 5523.0000905305. Note that the first 4 decimals coincide. The cubic root of 30503530 is about 312.4520417071.

The spelling of 30503530 in words is "thirty million, five hundred three thousand, five hundred thirty".