72321226 has 8 divisors (see below), whose sum is σ = 108521280. Its totient is φ = 36147468.

The previous prime is 72321169. The next prime is 72321257. The reversal of 72321226 is 62212327.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 72321226.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3225 + ... + 12451.

It is an arithmetic number, because the mean of its divisors is an integer number (13565160).

Almost surely, 2^72321226 is an apocalyptic number.

72321226 is a deficient number, since it is larger than the sum of its proper divisors (36200054).

72321226 is a wasteful number, since it uses less digits than its factorization.

72321226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13148.

The product of its digits is 2016, while the sum is 25.

The square root of 72321226 is about 8504.1887326188. The cubic root of 72321226 is about 416.6345292191.

The spelling of 72321226 in words is "seventy-two million, three hundred twenty-one thousand, two hundred twenty-six".