221592381696 has 405 divisors, whose sum is σ = 770275078419. Its totient is φ = 63176537088.

The previous prime is 221592381679. The next prime is 221592381697. The reversal of 221592381696 is 696183295122.

The square root of 221592381696 is 470736.

It is a perfect power (a square), and thus also a powerful number.

221592381696 is a `hidden beast` number, since 2 + 2 + 1 + 592 + 38 + 16 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (221592381697) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 474501655 + ... + 474502121.

Almost surely, 2^221592381696 is an apocalyptic number.

221592381696 is the 470736-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221592381696

221592381696 is an abundant number, since it is smaller than the sum of its proper divisors (548682696723).

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

221592381696 is an frugal number, since it uses more digits than its factorization.

221592381696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 479 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 221592381696 in words is "two hundred twenty-one billion, five hundred ninety-two million, three hundred eighty-one thousand, six hundred ninety-six".