30000015 has 12 divisors (see below), whose sum is σ = 52000104. Its totient is φ = 15999984.

The previous prime is 30000001. The next prime is 30000023. The reversal of 30000015 is 51000003.

It is not a de Polignac number, because 30000015 - 2⁴ = 29999999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 29999961 and 30000006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333289 + ... + 333378.

It is an arithmetic number, because the mean of its divisors is an integer number (4333342).

Almost surely, 2^30000015 is an apocalyptic number.

30000015 is a deficient number, since it is larger than the sum of its proper divisors (22000089).

30000015 is a wasteful number, since it uses less digits than its factorization.

30000015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666678 (or 666675 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 9.

The square root of 30000015 is about 5477.2269443579. The cubic root of 30000015 is about 310.7233023826.

Adding to 30000015 its reverse (51000003), we get a palindrome (81000018).

The spelling of 30000015 in words is "thirty million, fifteen", and thus it is an aban number and an uban number.