72217013 has 8 divisors (see below), whose sum is σ = 79224480. Its totient is φ = 65283280.

The previous prime is 72217001. The next prime is 72217027. The reversal of 72217013 is 31071227.

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 72217013 - 2⁴ = 72216997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72217013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72217063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16370 + ... + 20307.

It is an arithmetic number, because the mean of its divisors is an integer number (9903060).

Almost surely, 2^72217013 is an apocalyptic number.

It is an amenable number.

72217013 is a deficient number, since it is larger than the sum of its proper divisors (7007467).

72217013 is a wasteful number, since it uses less digits than its factorization.

72217013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36867.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 72217013 is about 8498.0593667025. The cubic root of 72217013 is about 416.4343131903.

The spelling of 72217013 in words is "seventy-two million, two hundred seventeen thousand, thirteen".