557605221 has 4 divisors (see below), whose sum is σ = 743473632. Its totient is φ = 371736812.

The previous prime is 557605201. The next prime is 557605241. The reversal of 557605221 is 122506755.

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 an interprime number because it is at equal distance from previous prime (557605201) and next prime (557605241).

It is a cyclic number.

It is not a de Polignac number, because 557605221 - 2¹¹ = 557603173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557605201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92934201 + ... + 92934206.

It is an arithmetic number, because the mean of its divisors is an integer number (185868408).

Almost surely, 2^557605221 is an apocalyptic number.

It is an amenable number.

557605221 is a deficient number, since it is larger than the sum of its proper divisors (185868411).

557605221 is a wasteful number, since it uses less digits than its factorization.

557605221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185868410.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 557605221 is about 23613.6659796822. The cubic root of 557605221 is about 823.0804326142.

The spelling of 557605221 in words is "five hundred fifty-seven million, six hundred five thousand, two hundred twenty-one".