72219218 has 8 divisors (see below), whose sum is σ = 113038848. Its totient is φ = 34539604.

The previous prime is 72219143. The next prime is 72219221. The reversal of 72219218 is 81291227.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784946 + ... + 785037.

It is an arithmetic number, because the mean of its divisors is an integer number (14129856).

Almost surely, 2^72219218 is an apocalyptic number.

72219218 is a deficient number, since it is larger than the sum of its proper divisors (40819630).

72219218 is a wasteful number, since it uses less digits than its factorization.

72219218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570008.

The product of its digits is 4032, while the sum is 32.

The square root of 72219218 is about 8498.1891012144. The cubic root of 72219218 is about 416.4385514729.

The spelling of 72219218 in words is "seventy-two million, two hundred nineteen thousand, two hundred eighteen".