557224921 has 8 divisors (see below), whose sum is σ = 624311424. Its totient is φ = 492876720.

The previous prime is 557224901. The next prime is 557224957. The reversal of 557224921 is 129422755.

557224921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 557224921 - 2¹³ = 557216729 is a prime.

It is a super-2 number, since 2×557224921² = 620999225166912482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (557224901) 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, 684145 + ... + 684958.

It is an arithmetic number, because the mean of its divisors is an integer number (78038928).

Almost surely, 2^557224921 is an apocalyptic number.

It is an amenable number.

557224921 is a deficient number, since it is larger than the sum of its proper divisors (67086503).

557224921 is a wasteful number, since it uses less digits than its factorization.

557224921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369151.

The product of its digits is 50400, while the sum is 37.

The square root of 557224921 is about 23605.6120657779. The cubic root of 557224921 is about 822.8932699255.

The spelling of 557224921 in words is "five hundred fifty-seven million, two hundred twenty-four thousand, nine hundred twenty-one".