72022321 has 4 divisors (see below), whose sum is σ = 82311232. Its totient is φ = 61733412.

The previous prime is 72022289. The next prime is 72022339. The reversal of 72022321 is 12322027.

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 72022321 - 2⁵ = 72022289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72022351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5144445 + ... + 5144458.

It is an arithmetic number, because the mean of its divisors is an integer number (20577808).

Almost surely, 2^72022321 is an apocalyptic number.

It is an amenable number.

72022321 is a deficient number, since it is larger than the sum of its proper divisors (10288911).

72022321 is a wasteful number, since it uses less digits than its factorization.

72022321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10288910.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 72022321 is about 8486.5965498544. The cubic root of 72022321 is about 416.0597504936.

Adding to 72022321 its reverse (12322027), we get a palindrome (84344348).

The spelling of 72022321 in words is "seventy-two million, twenty-two thousand, three hundred twenty-one".