221045244 has 48 divisors (see below), whose sum is σ = 590274048. Its totient is φ = 63067968.

The previous prime is 221045213. The next prime is 221045257. The reversal of 221045244 is 442540122.

It is a happy number.

221045244 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81234 + ... + 83910.

It is an arithmetic number, because the mean of its divisors is an integer number (12297376).

Almost surely, 2^221045244 is an apocalyptic number.

It is an amenable number.

221045244 is an abundant number, since it is smaller than the sum of its proper divisors (369228804).

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

221045244 is a wasteful number, since it uses less digits than its factorization.

221045244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674 (or 3672 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 221045244 is about 14867.5903898379. The cubic root of 221045244 is about 604.6356151076.

Adding to 221045244 its reverse (442540122), we get a palindrome (663585366).

The spelling of 221045244 in words is "two hundred twenty-one million, forty-five thousand, two hundred forty-four".