72011815 has 8 divisors (see below), whose sum is σ = 86464080. Its totient is φ = 57576192.

The previous prime is 72011809. The next prime is 72011833. The reversal of 72011815 is 51811027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72011815 - 2⁵ = 72011783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72011815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9367 + ... + 15223.

It is an arithmetic number, because the mean of its divisors is an integer number (10808010).

Almost surely, 2^72011815 is an apocalyptic number.

72011815 is a deficient number, since it is larger than the sum of its proper divisors (14452265).

72011815 is a wasteful number, since it uses less digits than its factorization.

72011815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321.

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 72011815 is about 8485.9775512312. The cubic root of 72011815 is about 416.0395190976.

The spelling of 72011815 in words is "seventy-two million, eleven thousand, eight hundred fifteen".