72569217 has 16 divisors (see below), whose sum is σ = 110719872. Its totient is φ = 41416320.

The previous prime is 72569213. The next prime is 72569239. The reversal of 72569217 is 71296527.

It is not a de Polignac number, because 72569217 - 2² = 72569213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72569213) 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, 20653 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (6919992).

Almost surely, 2^72569217 is an apocalyptic number.

It is an amenable number.

72569217 is a deficient number, since it is larger than the sum of its proper divisors (38150655).

72569217 is a wasteful number, since it uses less digits than its factorization.

72569217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4328.

The product of its digits is 52920, while the sum is 39.

The square root of 72569217 is about 8518.7567754925. The cubic root of 72569217 is about 417.1102021134.

The spelling of 72569217 in words is "seventy-two million, five hundred sixty-nine thousand, two hundred seventeen".