72216162 has 18 divisors (see below), whose sum is σ = 156546507. Its totient is φ = 24060036.

The previous prime is 72216149. The next prime is 72216167. The reversal of 72216162 is 26161227.

It can be written as a sum of positive squares in only one way, i.e., 36108081 + 36108081 = 6009^2 + 6009^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6009.

It is not an unprimeable number, because it can be changed into a prime (72216167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35053 + ... + 37055.

Almost surely, 2^72216162 is an apocalyptic number.

72216162 is an abundant number, since it is smaller than the sum of its proper divisors (84330345).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72216162 is an equidigital number, since it uses as much as digits as its factorization.

72216162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014 (or 2008 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 72216162 is about 8498.0092962999. The cubic root of 72216162 is about 416.4326774401.

Adding to 72216162 its reverse (26161227), we get a palindrome (98377389).

The spelling of 72216162 in words is "seventy-two million, two hundred sixteen thousand, one hundred sixty-two".