557402221 has 8 divisors (see below), whose sum is σ = 587062080. Its totient is φ = 527774688.

The previous prime is 557402203. The next prime is 557402267. The reversal of 557402221 is 122204755.

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 557402221 - 2⁵ = 557402189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 557402221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557402921) 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 7 ways as a sum of consecutive naturals, for example, 32625 + ... + 46681.

It is an arithmetic number, because the mean of its divisors is an integer number (73382760).

Almost surely, 2^557402221 is an apocalyptic number.

It is an amenable number.

557402221 is a deficient number, since it is larger than the sum of its proper divisors (29659859).

557402221 is a wasteful number, since it uses less digits than its factorization.

557402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16163.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 557402221 is about 23609.3672299789. The cubic root of 557402221 is about 822.9805378011.

Adding to 557402221 its reverse (122204755), we get a palindrome (679606976).

The spelling of 557402221 in words is "five hundred fifty-seven million, four hundred two thousand, two hundred twenty-one".