72306223 has 8 divisors (see below), whose sum is σ = 78941520. Its totient is φ = 65681280.

The previous prime is 72306173. The next prime is 72306233. The reversal of 72306223 is 32260327.

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 72306223 - 2⁹ = 72305711 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 (72306233) 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, 23511 + ... + 26407.

It is an arithmetic number, because the mean of its divisors is an integer number (9867690).

Almost surely, 2^72306223 is an apocalyptic number.

72306223 is a deficient number, since it is larger than the sum of its proper divisors (6635297).

72306223 is a wasteful number, since it uses less digits than its factorization.

72306223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 72306223 is about 8503.3065921440. The cubic root of 72306223 is about 416.6057170226.

The spelling of 72306223 in words is "seventy-two million, three hundred six thousand, two hundred twenty-three".