72102815 has 16 divisors (see below), whose sum is σ = 95040000. Its totient is φ = 52268832.

The previous prime is 72102809. The next prime is 72102839. The reversal of 72102815 is 51820127.

It is a cyclic number.

It is not a de Polignac number, because 72102815 - 2⁴ = 72102799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14315 + ... + 18684.

It is an arithmetic number, because the mean of its divisors is an integer number (5940000).

Almost surely, 2^72102815 is an apocalyptic number.

72102815 is a deficient number, since it is larger than the sum of its proper divisors (22937185).

72102815 is a wasteful number, since it uses less digits than its factorization.

72102815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33046.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 72102815 is about 8491.3376449179. The cubic root of 72102815 is about 416.2146924815.

The spelling of 72102815 in words is "seventy-two million, one hundred two thousand, eight hundred fifteen".