557222161 has 2 divisors, whose sum is σ = 557222162. Its totient is φ = 557222160.

The previous prime is 557222143. The next prime is 557222191. The reversal of 557222161 is 161222755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329785600 + 227436561 = 18160^2 + 15081^2 .

It is a cyclic number.

It is not a de Polignac number, because 557222161 - 2¹¹ = 557220113 is a prime.

It is equal to p_29204266 and since 557222161 and 29204266 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (557222111) 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, 278611080 + 278611081.

It is an arithmetic number, because the mean of its divisors is an integer number (278611081).

Almost surely, 2^557222161 is an apocalyptic number.

It is an amenable number.

557222161 is a deficient number, since it is larger than the sum of its proper divisors (1).

557222161 is an equidigital number, since it uses as much as digits as its factorization.

557222161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 557222161 is about 23605.5536050312. The cubic root of 557222161 is about 822.8919112945.

The spelling of 557222161 in words is "five hundred fifty-seven million, two hundred twenty-two thousand, one hundred sixty-one".