72251173 has 16 divisors (see below), whose sum is σ = 80676864. Its totient is φ = 64385280.

The previous prime is 72251161. The next prime is 72251177. The reversal of 72251173 is 37115227.

It is a cyclic number.

It is not a de Polignac number, because 72251173 - 2¹⁷ = 72120101 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 (72251177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23311 + ... + 26227.

It is an arithmetic number, because the mean of its divisors is an integer number (5042304).

Almost surely, 2^72251173 is an apocalyptic number.

It is an amenable number.

72251173 is a deficient number, since it is larger than the sum of its proper divisors (8425691).

72251173 is a wasteful number, since it uses less digits than its factorization.

72251173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012.

The product of its digits is 2940, while the sum is 28.

The square root of 72251173 is about 8500.0689997199. The cubic root of 72251173 is about 416.4999632506.

The spelling of 72251173 in words is "seventy-two million, two hundred fifty-one thousand, one hundred seventy-three".