72258317 has 4 divisors (see below), whose sum is σ = 73795776. Its totient is φ = 70720860.

The previous prime is 72258289. The next prime is 72258323. The reversal of 72258317 is 71385227.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71385227 = 17 ⋅4199131.

It is a cyclic number.

It is not a de Polignac number, because 72258317 - 2²² = 68064013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72258217) 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, 768659 + ... + 768752.

It is an arithmetic number, because the mean of its divisors is an integer number (18448944).

Almost surely, 2^72258317 is an apocalyptic number.

It is an amenable number.

72258317 is a deficient number, since it is larger than the sum of its proper divisors (1537459).

72258317 is a wasteful number, since it uses less digits than its factorization.

72258317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537458.

The product of its digits is 23520, while the sum is 35.

The square root of 72258317 is about 8500.4892212154. The cubic root of 72258317 is about 416.5136902604.

The spelling of 72258317 in words is "seventy-two million, two hundred fifty-eight thousand, three hundred seventeen".