72553217 has 8 divisors (see below), whose sum is σ = 80447232. Its totient is φ = 64875600.

The previous prime is 72553213. The next prime is 72553219. The reversal of 72553217 is 71235527.

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 72553217 - 2² = 72553213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72553213) 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, 53393 + ... + 54734.

It is an arithmetic number, because the mean of its divisors is an integer number (10055904).

Almost surely, 2^72553217 is an apocalyptic number.

It is an amenable number.

72553217 is a deficient number, since it is larger than the sum of its proper divisors (7894015).

72553217 is a wasteful number, since it uses less digits than its factorization.

72553217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108199.

The product of its digits is 14700, while the sum is 32.

The square root of 72553217 is about 8517.8176195549. The cubic root of 72553217 is about 417.0795451579.

The spelling of 72553217 in words is "seventy-two million, five hundred fifty-three thousand, two hundred seventeen".