221344550 has 48 divisors (see below), whose sum is σ = 477588480. Its totient is φ = 74748960.

The previous prime is 221344549. The next prime is 221344561. The reversal of 221344550 is 55443122.

It is a happy number.

221344550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18731 + ... + 28169.

It is an arithmetic number, because the mean of its divisors is an integer number (9949760).

Almost surely, 2^221344550 is an apocalyptic number.

221344550 is an abundant number, since it is smaller than the sum of its proper divisors (256243930).

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

221344550 is a wasteful number, since it uses less digits than its factorization.

221344550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9525 (or 9520 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 221344550 is about 14877.6527046440. The cubic root of 221344550 is about 604.9083940258.

Adding to 221344550 its reverse (55443122), we get a palindrome (276787672).

The spelling of 221344550 in words is "two hundred twenty-one million, three hundred forty-four thousand, five hundred fifty".