550550551 has 2 divisors, whose sum is σ = 550550552. Its totient is φ = 550550550.

The previous prime is 550550531. The next prime is 550550569. The reversal of 550550551 is 155055055.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 550550551 - 2²⁵ = 516996119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550550531) 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, 275275275 + 275275276.

It is an arithmetic number, because the mean of its divisors is an integer number (275275276).

Almost surely, 2^550550551 is an apocalyptic number.

550550551 is a deficient number, since it is larger than the sum of its proper divisors (1).

550550551 is an equidigital number, since it uses as much as digits as its factorization.

550550551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15625, while the sum is 31.

The square root of 550550551 is about 23463.8136499590. The cubic root of 550550551 is about 819.5945601270.

The spelling of 550550551 in words is "five hundred fifty million, five hundred fifty thousand, five hundred fifty-one".