221044454 has 8 divisors (see below), whose sum is σ = 331829760. Its totient is φ = 110434536.

The previous prime is 221044451. The next prime is 221044471. The reversal of 221044454 is 454440122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221044451) 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 3 ways as a sum of consecutive naturals, for example, 40649 + ... + 45764.

It is an arithmetic number, because the mean of its divisors is an integer number (41478720).

Almost surely, 2^221044454 is an apocalyptic number.

221044454 is a deficient number, since it is larger than the sum of its proper divisors (110785306).

221044454 is a wasteful number, since it uses less digits than its factorization.

221044454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87694.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 221044454 is about 14867.5638219582. The cubic root of 221044454 is about 604.6348947985.

Adding to 221044454 its reverse (454440122), we get a palindrome (675484576).

It can be divided in two parts, 2210 and 44454, that added together give a palindrome (46664).

The spelling of 221044454 in words is "two hundred twenty-one million, forty-four thousand, four hundred fifty-four".