221344458 has 8 divisors (see below), whose sum is σ = 442688928. Its totient is φ = 73781484.

The previous prime is 221344451. The next prime is 221344477. The reversal of 221344458 is 854443122.

221344458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

221344458 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (221344451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18445366 + ... + 18445377.

It is an arithmetic number, because the mean of its divisors is an integer number (55336116).

Almost surely, 2^221344458 is an apocalyptic number.

221344458 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221344458 is a wasteful number, since it uses less digits than its factorization.

221344458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36890748.

The product of its digits is 30720, while the sum is 33.

The square root of 221344458 is about 14877.6496127581. The cubic root of 221344458 is about 604.9083102175.

The spelling of 221344458 in words is "two hundred twenty-one million, three hundred forty-four thousand, four hundred fifty-eight".