72165022 has 16 divisors (see below), whose sum is σ = 113544000. Its totient is φ = 34358688.

The previous prime is 72165001. The next prime is 72165029. The reversal of 72165022 is 22056127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72165029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6897 + ... + 13852.

It is an arithmetic number, because the mean of its divisors is an integer number (7096500).

Almost surely, 2^72165022 is an apocalyptic number.

72165022 is a deficient number, since it is larger than the sum of its proper divisors (41378978).

72165022 is a wasteful number, since it uses less digits than its factorization.

72165022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20835.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 72165022 is about 8494.9998234255. Note that the first 3 decimals coincide. The cubic root of 72165022 is about 416.3343550538.

The spelling of 72165022 in words is "seventy-two million, one hundred sixty-five thousand, twenty-two".