557221608 has 24 divisors (see below), whose sum is σ = 1509142050. Its totient is φ = 185740512.

The previous prime is 557221601. The next prime is 557221663. The reversal of 557221608 is 806122755.

It is a happy number.

557221608 is a `hidden beast` number, since 5 + 572 + 21 + 60 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 542796804 + 14424804 = 23298^2 + 3798^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (557221601) 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 5 ways as a sum of consecutive naturals, for example, 3869523 + ... + 3869666.

Almost surely, 2^557221608 is an apocalyptic number.

It is an amenable number.

557221608 is an abundant number, since it is smaller than the sum of its proper divisors (951920442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

557221608 is a wasteful number, since it uses less digits than its factorization.

557221608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7739201 (or 7739194 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 557221608 is about 23605.5418916830. The cubic root of 557221608 is about 822.8916390755.

The spelling of 557221608 in words is "five hundred fifty-seven million, two hundred twenty-one thousand, six hundred eight".