557122091 has 2 divisors, whose sum is σ = 557122092. Its totient is φ = 557122090.

The previous prime is 557122081. The next prime is 557122109. The reversal of 557122091 is 190221755.

It is a happy number.

Together with next prime (557122109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557122091 - 2¹⁰ = 557121067 is a prime.

It is not a weakly prime, because it can be changed into another prime (557122021) 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, 278561045 + 278561046.

It is an arithmetic number, because the mean of its divisors is an integer number (278561046).

Almost surely, 2^557122091 is an apocalyptic number.

557122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

557122091 is an equidigital number, since it uses as much as digits as its factorization.

557122091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 557122091 is about 23603.4338815351. The cubic root of 557122091 is about 822.8426480447.

The spelling of 557122091 in words is "five hundred fifty-seven million, one hundred twenty-two thousand, ninety-one".