72225317 has 4 divisors (see below), whose sum is σ = 72305856. Its totient is φ = 72144780.

The previous prime is 72225311. The next prime is 72225343. The reversal of 72225317 is 71352227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72225317 - 2¹⁰ = 72224293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72225317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72225311) 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, 38909 + ... + 40722.

It is an arithmetic number, because the mean of its divisors is an integer number (18076464).

Almost surely, 2^72225317 is an apocalyptic number.

It is an amenable number.

72225317 is a deficient number, since it is larger than the sum of its proper divisors (80539).

72225317 is an equidigital number, since it uses as much as digits as its factorization.

72225317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80538.

The product of its digits is 5880, while the sum is 29.

The square root of 72225317 is about 8498.5479347945. The cubic root of 72225317 is about 416.4502740554.

The spelling of 72225317 in words is "seventy-two million, two hundred twenty-five thousand, three hundred seventeen".