556550551 has 2 divisors, whose sum is σ = 556550552. Its totient is φ = 556550550.

The previous prime is 556550537. The next prime is 556550563. The reversal of 556550551 is 155055655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 556550551 - 2¹³ = 556542359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556550551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556550531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278275275 + 278275276.

It is an arithmetic number, because the mean of its divisors is an integer number (278275276).

Almost surely, 2^556550551 is an apocalyptic number.

556550551 is a deficient number, since it is larger than the sum of its proper divisors (1).

556550551 is an equidigital number, since it uses as much as digits as its factorization.

556550551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93750, while the sum is 37.

The square root of 556550551 is about 23591.3236381514. The cubic root of 556550551 is about 822.5611726998.

The spelling of 556550551 in words is "five hundred fifty-six million, five hundred fifty thousand, five hundred fifty-one".