221293233861184 has 21 divisors (see below), whose sum is σ = 439128997098771. Its totient is φ = 110646557426880.

The previous prime is 221293233861181. The next prime is 221293233861263. The reversal of 221293233861184 is 481168332392122.

The square root of 221293233861184 is 14875928.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221293233861181) 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 2 ways as a sum of consecutive naturals, for example, 118077679 + ... + 119937169.

It is an arithmetic number, because the mean of its divisors is an integer number (20910904623751).

Almost surely, 2^{221293233861184} is an apocalyptic number.

221293233861184 is the 14875928-th square number.

It is an amenable number.

221293233861184 is a deficient number, since it is larger than the sum of its proper divisors (217835763237587).

221293233861184 is an frugal number, since it uses more digits than its factorization.

221293233861184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718994 (or 1859493 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The spelling of 221293233861184 in words is "two hundred twenty-one trillion, two hundred ninety-three billion, two hundred thirty-three million, eight hundred sixty-one thousand, one hundred eighty-four".