51550319 has 2 divisors, whose sum is σ = 51550320. Its totient is φ = 51550318.

The previous prime is 51550309. The next prime is 51550333. The reversal of 51550319 is 91305515.

It is a happy number.

51550319 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 51550319 - 2¹² = 51546223 is a prime.

It is a super-3 number, since 3×51550319³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 51550291 and 51550300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51550309) 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, 25775159 + 25775160.

It is an arithmetic number, because the mean of its divisors is an integer number (25775160).

Almost surely, 2^51550319 is an apocalyptic number.

51550319 is a deficient number, since it is larger than the sum of its proper divisors (1).

51550319 is an equidigital number, since it uses as much as digits as its factorization.

51550319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3375, while the sum is 29.

The square root of 51550319 is about 7179.8550821030. The cubic root of 51550319 is about 372.1720766123.

The spelling of 51550319 in words is "fifty-one million, five hundred fifty thousand, three hundred nineteen".