72218023 has 8 divisors (see below), whose sum is σ = 76606992. Its totient is φ = 67844736.

The previous prime is 72218021. The next prime is 72218039. The reversal of 72218023 is 32081227.

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 72218023 - 2¹ = 72218021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72218021) 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, 6361 + ... + 13597.

It is an arithmetic number, because the mean of its divisors is an integer number (9575874).

Almost surely, 2^72218023 is an apocalyptic number.

72218023 is a deficient number, since it is larger than the sum of its proper divisors (4388969).

72218023 is a wasteful number, since it uses less digits than its factorization.

72218023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 72218023 is about 8498.1187918268. The cubic root of 72218023 is about 416.4362545459.

The spelling of 72218023 in words is "seventy-two million, two hundred eighteen thousand, twenty-three".