549902221 has 4 divisors (see below), whose sum is σ = 599893344. Its totient is φ = 499911100.

The previous prime is 549902219. The next prime is 549902233. The reversal of 549902221 is 122209945.

549902221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 549902221 - 2¹ = 549902219 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 (549902261) 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, 24995545 + ... + 24995566.

It is an arithmetic number, because the mean of its divisors is an integer number (149973336).

Almost surely, 2^549902221 is an apocalyptic number.

It is an amenable number.

549902221 is a deficient number, since it is larger than the sum of its proper divisors (49991123).

549902221 is a wasteful number, since it uses less digits than its factorization.

549902221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49991122.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 549902221 is about 23449.9940511720. The cubic root of 549902221 is about 819.2727147446.

The spelling of 549902221 in words is "five hundred forty-nine million, nine hundred two thousand, two hundred twenty-one".