72221595 has 24 divisors (see below), whose sum is σ = 118795824. Its totient is φ = 37466496.

The previous prime is 72221561. The next prime is 72221647. The reversal of 72221595 is 59512227.

It is a happy number.

It is not a de Polignac number, because 72221595 - 2⁶ = 72221531 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18777 + ... + 22293.

It is an arithmetic number, because the mean of its divisors is an integer number (4949826).

Almost surely, 2^72221595 is an apocalyptic number.

72221595 is a deficient number, since it is larger than the sum of its proper divisors (46574229).

72221595 is a wasteful number, since it uses less digits than its factorization.

72221595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3599 (or 3562 counting only the distinct ones).

The product of its digits is 12600, while the sum is 33.

The square root of 72221595 is about 8498.3289533884. The cubic root of 72221595 is about 416.4431202640.

The spelling of 72221595 in words is "seventy-two million, two hundred twenty-one thousand, five hundred ninety-five".