72216493 has 8 divisors (see below), whose sum is σ = 77208768. Its totient is φ = 67306944.

The previous prime is 72216449. The next prime is 72216499. The reversal of 72216493 is 39461227.

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

It is not a de Polignac number, because 72216493 - 2²⁵ = 38662061 is a prime.

It is a super-2 number, since 2×72216493² = 10430443722438098, 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 (72216499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18871 + ... + 22372.

It is an arithmetic number, because the mean of its divisors is an integer number (9651096).

Almost surely, 2^72216493 is an apocalyptic number.

It is an amenable number.

72216493 is a deficient number, since it is larger than the sum of its proper divisors (4992275).

72216493 is a wasteful number, since it uses less digits than its factorization.

72216493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41363.

The product of its digits is 18144, while the sum is 34.

The square root of 72216493 is about 8498.0287714269. The cubic root of 72216493 is about 416.4333136735.

The spelling of 72216493 in words is "seventy-two million, two hundred sixteen thousand, four hundred ninety-three".