72225566321 has 8 divisors (see below), whose sum is σ = 74185903104. Its totient is φ = 70265666160.

The previous prime is 72225566263. The next prime is 72225566353. The reversal of 72225566321 is 12366552227.

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 72225566321 - 2¹⁰ = 72225565297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72225566221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241226 + ... + 450156.

It is an arithmetic number, because the mean of its divisors is an integer number (9273237888).

Almost surely, 2^72225566321 is an apocalyptic number.

It is an amenable number.

72225566321 is a deficient number, since it is larger than the sum of its proper divisors (1960336783).

72225566321 is a wasteful number, since it uses less digits than its factorization.

72225566321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218311.

The product of its digits is 302400, while the sum is 41.

The spelling of 72225566321 in words is "seventy-two billion, two hundred twenty-five million, five hundred sixty-six thousand, three hundred twenty-one".