557384881 has 3 divisors (see below), whose sum is σ = 557408491. Its totient is φ = 557361272.

The previous prime is 557384869. The next prime is 557384897. The reversal of 557384881 is 188483755.

The square root of 557384881 is 23609.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 83887281 + 473497600 = 9159^2 + 21760^2 .

It is not a de Polignac number, because 557384881 - 2⁷ = 557384753 is a prime.

It is a super-2 number, since 2×557384881² = 621355811134768322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557384801) 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 2 ways as a sum of consecutive naturals, for example, 11805 + ... + 35413.

Almost surely, 2^557384881 is an apocalyptic number.

557384881 is the 23609-th square number.

557384881 is the 11805-th centered octagonal number.

It is an amenable number.

557384881 is a deficient number, since it is larger than the sum of its proper divisors (23610).

557384881 is an frugal number, since it uses more digits than its factorization.

557384881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47218 (or 23609 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

The cubic root of 557384881 is about 822.9720037898.

Multiplying 557384881 by its sum of digits (49), we get a square (27311859169 = 165263²).

The spelling of 557384881 in words is "five hundred fifty-seven million, three hundred eighty-four thousand, eight hundred eighty-one".