72221155200 has 672 divisors, whose sum is σ = 271439423640. Its totient is φ = 18975928320.

The previous prime is 72221155187. The next prime is 72221155211. The reversal of 72221155200 is 255112227.

72221155200 is a `hidden beast` number, since 7 + 2 + 22 + 115 + 520 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 193622214 + ... + 193622586.

Almost surely, 2^72221155200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72221155200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135719711820).

72221155200 is an abundant number, since it is smaller than the sum of its proper divisors (199218268440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72221155200 is an equidigital number, since it uses as much as digits as its factorization.

72221155200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

Adding to 72221155200 its reverse (255112227), we get a palindrome (72476267427).

The spelling of 72221155200 in words is "seventy-two billion, two hundred twenty-one million, one hundred fifty-five thousand, two hundred".