555849221 has 4 divisors (see below), whose sum is σ = 588546252. Its totient is φ = 523152192.

The previous prime is 555849209. The next prime is 555849241. The reversal of 555849221 is 122948555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 243796996 + 312052225 = 15614^2 + 17665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555849221 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 (555849241) 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, 16348490 + ... + 16348523.

It is an arithmetic number, because the mean of its divisors is an integer number (147136563).

Almost surely, 2^555849221 is an apocalyptic number.

It is an amenable number.

555849221 is a deficient number, since it is larger than the sum of its proper divisors (32697031).

555849221 is a wasteful number, since it uses less digits than its factorization.

555849221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32697030.

The product of its digits is 144000, while the sum is 41.

The square root of 555849221 is about 23576.4548013479. The cubic root of 555849221 is about 822.2155141818.

The spelling of 555849221 in words is "five hundred fifty-five million, eight hundred forty-nine thousand, two hundred twenty-one".