557082181 has 2 divisors, whose sum is σ = 557082182. Its totient is φ = 557082180.

The previous prime is 557082151. The next prime is 557082187. The reversal of 557082181 is 181280755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548028100 + 9054081 = 23410^2 + 3009^2 .

It is a cyclic number.

It is not a de Polignac number, because 557082181 - 2¹⁵ = 557049413 is a prime.

It is a super-2 number, since 2×557082181² = 620681112775433522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 557082181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557082187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278541090 + 278541091.

It is an arithmetic number, because the mean of its divisors is an integer number (278541091).

Almost surely, 2^557082181 is an apocalyptic number.

It is an amenable number.

557082181 is a deficient number, since it is larger than the sum of its proper divisors (1).

557082181 is an equidigital number, since it uses as much as digits as its factorization.

557082181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 37.

The square root of 557082181 is about 23602.5884385590. The cubic root of 557082181 is about 822.8229991892.

The spelling of 557082181 in words is "five hundred fifty-seven million, eighty-two thousand, one hundred eighty-one".