30815163 has 12 divisors (see below), whose sum is σ = 44657080. Its totient is φ = 20475936.

The previous prime is 30815143. The next prime is 30815171. The reversal of 30815163 is 36151803.

It is a de Polignac number, because none of the positive numbers 2^k-30815163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30815123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2653 + ... + 8286.

Almost surely, 2^30815163 is an apocalyptic number.

30815163 is a deficient number, since it is larger than the sum of its proper divisors (13841917).

30815163 is a wasteful number, since it uses less digits than its factorization.

30815163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11258 (or 11255 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 30815163 is about 5551.1406935872. The cubic root of 30815163 is about 313.5124725088.

Adding to 30815163 its reverse (36151803), we get a palindrome (66966966).

The spelling of 30815163 in words is "thirty million, eight hundred fifteen thousand, one hundred sixty-three".