557171220 has 48 divisors (see below), whose sum is σ = 1586531520. Its totient is φ = 146059776.

The previous prime is 557171213. The next prime is 557171227. The reversal of 557171220 is 22171755.

It is an interprime number because it is at equal distance from previous prime (557171213) and next prime (557171227).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557171227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75157 + ... + 82236.

It is an arithmetic number, because the mean of its divisors is an integer number (33052740).

Almost surely, 2^557171220 is an apocalyptic number.

It is an amenable number.

557171220 is an abundant number, since it is smaller than the sum of its proper divisors (1029360300).

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

557171220 is a wasteful number, since it uses less digits than its factorization.

557171220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157464 (or 157462 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 557171220 is about 23604.4745758087. The cubic root of 557171220 is about 822.8668343938.

The spelling of 557171220 in words is "five hundred fifty-seven million, one hundred seventy-one thousand, two hundred twenty".