550353221 has 32 divisors (see below), whose sum is σ = 651110400. Its totient is φ = 459838080.

The previous prime is 550353217. The next prime is 550353233. The reversal of 550353221 is 122353055.

It is a cyclic number.

It is not a de Polignac number, because 550353221 - 2² = 550353217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550353241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1758161 + ... + 1758473.

It is an arithmetic number, because the mean of its divisors is an integer number (20347200).

Almost surely, 2^550353221 is an apocalyptic number.

It is an amenable number.

550353221 is a deficient number, since it is larger than the sum of its proper divisors (100757179).

550353221 is a wasteful number, since it uses less digits than its factorization.

550353221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 550353221 is about 23459.6082874374. The cubic root of 550353221 is about 819.4966279021.

The spelling of 550353221 in words is "five hundred fifty million, three hundred fifty-three thousand, two hundred twenty-one".