72216719 has 8 divisors (see below), whose sum is σ = 72850752. Its totient is φ = 71585920.

The previous prime is 72216713. The next prime is 72216733. The reversal of 72216719 is 91761227.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72216719 is a prime.

It is a super-2 number, since 2×72216719² = 10430509006249922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72216713) 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, 64922 + ... + 66024.

It is an arithmetic number, because the mean of its divisors is an integer number (9106344).

Almost surely, 2^72216719 is an apocalyptic number.

72216719 is a deficient number, since it is larger than the sum of its proper divisors (634033).

72216719 is a wasteful number, since it uses less digits than its factorization.

72216719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617.

The product of its digits is 10584, while the sum is 35.

The square root of 72216719 is about 8498.0420686179. The cubic root of 72216719 is about 416.4337480795.

The spelling of 72216719 in words is "seventy-two million, two hundred sixteen thousand, seven hundred nineteen".