557142161 has 2 divisors, whose sum is σ = 557142162. Its totient is φ = 557142160.

The previous prime is 557142151. The next prime is 557142167. The reversal of 557142161 is 161241755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481539136 + 75603025 = 21944^2 + 8695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-557142161 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (557142167) 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 as a sum of consecutive naturals, namely, 278571080 + 278571081.

It is an arithmetic number, because the mean of its divisors is an integer number (278571081).

Almost surely, 2^557142161 is an apocalyptic number.

It is an amenable number.

557142161 is a deficient number, since it is larger than the sum of its proper divisors (1).

557142161 is an equidigital number, since it uses as much as digits as its factorization.

557142161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 32.

The square root of 557142161 is about 23603.8590277099. The cubic root of 557142161 is about 822.8525287356.

It can be divided in two parts, 55714 and 2161, that added together give a palindrome (57875).

The spelling of 557142161 in words is "five hundred fifty-seven million, one hundred forty-two thousand, one hundred sixty-one".