557487221 has 8 divisors (see below), whose sum is σ = 561549120. Its totient is φ = 553433472.

The previous prime is 557487211. The next prime is 557487233. The reversal of 557487221 is 122784755.

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 557487221 - 2¹⁰ = 557486197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557487211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213701 + ... + 216293.

It is an arithmetic number, because the mean of its divisors is an integer number (70193640).

Almost surely, 2^557487221 is an apocalyptic number.

It is an amenable number.

557487221 is a deficient number, since it is larger than the sum of its proper divisors (4061899).

557487221 is a wasteful number, since it uses less digits than its factorization.

557487221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075.

The product of its digits is 156800, while the sum is 41.

The square root of 557487221 is about 23611.1672943122. The cubic root of 557487221 is about 823.0223686296.

The spelling of 557487221 in words is "five hundred fifty-seven million, four hundred eighty-seven thousand, two hundred twenty-one".