72055209 has 8 divisors (see below), whose sum is σ = 96145632. Its totient is φ = 48000800.

The previous prime is 72055187. The next prime is 72055211. The reversal of 72055209 is 90255027.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72055209 - 2¹¹ = 72053161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72055219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3924 + ... + 12629.

It is an arithmetic number, because the mean of its divisors is an integer number (12018204).

Almost surely, 2^72055209 is an apocalyptic number.

It is an amenable number.

72055209 is a deficient number, since it is larger than the sum of its proper divisors (24090423).

72055209 is a wasteful number, since it uses less digits than its factorization.

72055209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18007.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 72055209 is about 8488.5339723653. The cubic root of 72055209 is about 416.1230701730.

The spelling of 72055209 in words is "seventy-two million, fifty-five thousand, two hundred nine".