72383221 has 8 divisors (see below), whose sum is σ = 73432800. Its totient is φ = 71338032.

The previous prime is 72383203. The next prime is 72383239. The reversal of 72383221 is 12238327.

It is an interprime number because it is at equal distance from previous prime (72383203) and next prime (72383239).

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 72383221 - 2⁵ = 72383189 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 72383221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72383251) 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, 45955 + ... + 47503.

It is an arithmetic number, because the mean of its divisors is an integer number (9179100).

Almost surely, 2^72383221 is an apocalyptic number.

It is an amenable number.

72383221 is a deficient number, since it is larger than the sum of its proper divisors (1049579).

72383221 is a wasteful number, since it uses less digits than its factorization.

72383221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195.

The product of its digits is 4032, while the sum is 28.

The square root of 72383221 is about 8507.8329203153. The cubic root of 72383221 is about 416.7535439821.

The spelling of 72383221 in words is "seventy-two million, three hundred eighty-three thousand, two hundred twenty-one".