72227169 has 36 divisors (see below), whose sum is σ = 126690304. Its totient is φ = 38835072.

The previous prime is 72227161. The next prime is 72227171. The reversal of 72227169 is 96172227.

It is not a de Polignac number, because 72227169 - 2³ = 72227161 is a prime.

It is a super-2 number, since 2×72227169² = 10433527883509122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72227161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16224 + ... + 20190.

Almost surely, 2^72227169 is an apocalyptic number.

It is an amenable number.

72227169 is a deficient number, since it is larger than the sum of its proper divisors (54463135).

72227169 is a wasteful number, since it uses less digits than its factorization.

72227169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014 (or 3994 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 72227169 is about 8498.6568938862. The cubic root of 72227169 is about 416.4538335613.

The spelling of 72227169 in words is "seventy-two million, two hundred twenty-seven thousand, one hundred sixty-nine".