72015015 has 16 divisors (see below), whose sum is σ = 118941696. Its totient is φ = 37168800.

The previous prime is 72014989. The next prime is 72015029. The reversal of 72015015 is 51051027.

It is not a de Polignac number, because 72015015 - 2¹² = 72010919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72014982 and 72015000.

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, 76971 + ... + 77900.

It is an arithmetic number, because the mean of its divisors is an integer number (7433856).

Almost surely, 2^72015015 is an apocalyptic number.

72015015 is a deficient number, since it is larger than the sum of its proper divisors (46926681).

72015015 is a wasteful number, since it uses less digits than its factorization.

72015015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154910.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 72015015 is about 8486.1660954756. The cubic root of 72015015 is about 416.0456815435.

The spelling of 72015015 in words is "seventy-two million, fifteen thousand, fifteen".