221950285456 has 15 divisors (see below), whose sum is σ = 430032329251. Its totient is φ = 110974200496.

The previous prime is 221950285433. The next prime is 221950285457. The reversal of 221950285456 is 654582059122.

The square root of 221950285456 is 471116.

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 (221950285457) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 1825575 + ... + 1943353.

Almost surely, 2^221950285456 is an apocalyptic number.

221950285456 is the 471116-th square number.

It is an amenable number.

221950285456 is a deficient number, since it is larger than the sum of its proper divisors (208082043795).

221950285456 is an frugal number, since it uses more digits than its factorization.

221950285456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235566 (or 117781 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 49.

Multiplying 221950285456 by its sum of digits (49), we get a square (10875563987344 = 3297812²).

The spelling of 221950285456 in words is "two hundred twenty-one billion, nine hundred fifty million, two hundred eighty-five thousand, four hundred fifty-six".