50551819 has 2 divisors, whose sum is σ = 50551820. Its totient is φ = 50551818.

The previous prime is 50551817. The next prime is 50551871. The reversal of 50551819 is 91815505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50551819 - 2¹ = 50551817 is a prime.

It is a super-2 number, since 2×50551819² = 5110972808417522, which contains 22 as substring.

Together with 50551817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (50551817) 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, 25275909 + 25275910.

It is an arithmetic number, because the mean of its divisors is an integer number (25275910).

Almost surely, 2^50551819 is an apocalyptic number.

50551819 is a deficient number, since it is larger than the sum of its proper divisors (1).

50551819 is an equidigital number, since it uses as much as digits as its factorization.

50551819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 50551819 is about 7109.9802390724. The cubic root of 50551819 is about 369.7534734706.

The spelling of 50551819 in words is "fifty million, five hundred fifty-one thousand, eight hundred nineteen".