50551 has 2 divisors, whose sum is σ = 50552.
Its totient is φ = 50550.
The previous prime is 50549. The next prime is 50581. The reversal of 50551 is 15505.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 50551 - 21 = 50549 is a prime.
Together with 50549, it forms a pair of twin primes.
It is an Ulam number.
50551 is a lucky number.
It is a nialpdrome in base 15.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (50581) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25275 + 25276.
It is an arithmetic number, because the mean of its divisors is an integer number (25276).
250551 is an apocalyptic number.
50551 is a deficient number, since it is larger than the sum of its proper divisors (1).
50551 is an equidigital number, since it uses as much as digits as its factorization.
50551 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 125, while the sum is 16.
The square root of 50551 is about 224.8354954183.
The cubic root of 50551 is about 36.9751476643.
The spelling of 50551 in words is "fifty thousand, five hundred fifty-one".