557206417221 has 4 divisors (see below), whose sum is σ = 742941889632. Its totient is φ = 371470944812.

The previous prime is 557206417219. The next prime is 557206417247. The reversal of 557206417221 is 122714602755.

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 557206417221 - 2¹ = 557206417219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557206417021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92867736201 + ... + 92867736206.

It is an arithmetic number, because the mean of its divisors is an integer number (185735472408).

Almost surely, 2^557206417221 is an apocalyptic number.

It is an amenable number.

557206417221 is a deficient number, since it is larger than the sum of its proper divisors (185735472411).

557206417221 is a wasteful number, since it uses less digits than its factorization.

557206417221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185735472410.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 557206417221 in words is "five hundred fifty-seven billion, two hundred six million, four hundred seventeen thousand, two hundred twenty-one".