549506221 has 8 divisors (see below), whose sum is σ = 599642784. Its totient is φ = 499399920.

The previous prime is 549506183. The next prime is 549506227. The reversal of 549506221 is 122605945.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 549506221 - 2¹¹ = 549504173 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 (549506227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48526 + ... + 58768.

It is an arithmetic number, because the mean of its divisors is an integer number (74955348).

Almost surely, 2^549506221 is an apocalyptic number.

It is an amenable number.

549506221 is a deficient number, since it is larger than the sum of its proper divisors (50136563).

549506221 is a wasteful number, since it uses less digits than its factorization.

549506221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15131.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 549506221 is about 23441.5490315807. The cubic root of 549506221 is about 819.0760071050.

The spelling of 549506221 in words is "five hundred forty-nine million, five hundred six thousand, two hundred twenty-one".