72199217 has 8 divisors (see below), whose sum is σ = 74760192. Its totient is φ = 69652800.

The previous prime is 72199199. The next prime is 72199229. The reversal of 72199217 is 71299127.

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 72199217 - 2²⁴ = 55422001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72199817) 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, 6992 + ... + 13902.

It is an arithmetic number, because the mean of its divisors is an integer number (9345024).

Almost surely, 2^72199217 is an apocalyptic number.

It is an amenable number.

72199217 is a deficient number, since it is larger than the sum of its proper divisors (2560975).

72199217 is a wasteful number, since it uses less digits than its factorization.

72199217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279.

The product of its digits is 15876, while the sum is 38.

The square root of 72199217 is about 8497.0122396052. The cubic root of 72199217 is about 416.4001039205.

The spelling of 72199217 in words is "seventy-two million, one hundred ninety-nine thousand, two hundred seventeen".