30115215 has 24 divisors (see below), whose sum is σ = 56216160. Its totient is φ = 14825664.

The previous prime is 30115199. The next prime is 30115237. The reversal of 30115215 is 51251103.

It is not a de Polignac number, because 30115215 - 2⁴ = 30115199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25155 + ... + 26324.

It is an arithmetic number, because the mean of its divisors is an integer number (2342340).

Almost surely, 2^30115215 is an apocalyptic number.

30115215 is a deficient number, since it is larger than the sum of its proper divisors (26100945).

30115215 is a wasteful number, since it uses less digits than its factorization.

30115215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51503 (or 51500 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 30115215 is about 5487.7331385555. The cubic root of 30115215 is about 311.1205200055.

Adding to 30115215 its reverse (51251103), we get a palindrome (81366318).

The spelling of 30115215 in words is "thirty million, one hundred fifteen thousand, two hundred fifteen".