50505551 has 2 divisors, whose sum is σ = 50505552. Its totient is φ = 50505550.

The previous prime is 50505547. The next prime is 50505571. The reversal of 50505551 is 15550505.

50505551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50505551 - 2² = 50505547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 50505551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50505571) 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, 25252775 + 25252776.

It is an arithmetic number, because the mean of its divisors is an integer number (25252776).

Almost surely, 2^50505551 is an apocalyptic number.

50505551 is a deficient number, since it is larger than the sum of its proper divisors (1).

50505551 is an equidigital number, since it uses as much as digits as its factorization.

50505551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3125, while the sum is 26.

The square root of 50505551 is about 7106.7257580408. The cubic root of 50505551 is about 369.6406323236.

It can be divided in two parts, 5050 and 5551, that added together give a palindrome (10601).

The spelling of 50505551 in words is "fifty million, five hundred five thousand, five hundred fifty-one".