72220799 has 4 divisors (see below), whose sum is σ = 82538064. Its totient is φ = 61903536.

The previous prime is 72220789. The next prime is 72220801. The reversal of 72220799 is 99702227.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72220799 - 2¹⁶ = 72155263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72220789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5158622 + ... + 5158635.

It is an arithmetic number, because the mean of its divisors is an integer number (20634516).

Almost surely, 2^72220799 is an apocalyptic number.

72220799 is a deficient number, since it is larger than the sum of its proper divisors (10317265).

72220799 is a wasteful number, since it uses less digits than its factorization.

72220799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317264.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 72220799 is about 8498.2821205229. The cubic root of 72220799 is about 416.4415902972.

The spelling of 72220799 in words is "seventy-two million, two hundred twenty thousand, seven hundred ninety-nine".