72222215 has 16 divisors (see below), whose sum is σ = 93744000. Its totient is φ = 53098752.

The previous prime is 72222193. The next prime is 72222229. The reversal of 72222215 is 51222227.

It is a cyclic number.

It is not a de Polignac number, because 72222215 - 2¹² = 72218119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13211 + ... + 17859.

It is an arithmetic number, because the mean of its divisors is an integer number (5859000).

Almost surely, 2^72222215 is an apocalyptic number.

72222215 is a deficient number, since it is larger than the sum of its proper divisors (21521785).

72222215 is a wasteful number, since it uses less digits than its factorization.

72222215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906.

The product of its digits is 1120, while the sum is 23.

The square root of 72222215 is about 8498.3654310697. The cubic root of 72222215 is about 416.4443119390. Note that the first 3 decimals are identical.

It can be divided in two parts, 7 and 2222215, that added together give a palindrome (2222222).

The spelling of 72222215 in words is "seventy-two million, two hundred twenty-two thousand, two hundred fifteen".