30504155 has 16 divisors (see below), whose sum is σ = 41223168. Its totient is φ = 21468000.

The previous prime is 30504151. The next prime is 30504161. The reversal of 30504155 is 55140503.

It is not a de Polignac number, because 30504155 - 2² = 30504151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30504155.

It is not an unprimeable number, because it can be changed into a prime (30504151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7241 + ... + 10650.

It is an arithmetic number, because the mean of its divisors is an integer number (2576448).

Almost surely, 2^30504155 is an apocalyptic number.

30504155 is a deficient number, since it is larger than the sum of its proper divisors (10719013).

30504155 is a wasteful number, since it uses less digits than its factorization.

30504155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17938.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 30504155 is about 5523.0566718077. The cubic root of 30504155 is about 312.4541756808.

Adding to 30504155 its reverse (55140503), we get a palindrome (85644658).

The spelling of 30504155 in words is "thirty million, five hundred four thousand, one hundred fifty-five".