51273251 has 2 divisors, whose sum is σ = 51273252. Its totient is φ = 51273250.

The previous prime is 51273239. The next prime is 51273253. The reversal of 51273251 is 15237215.

51273251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51273251 - 2¹⁰ = 51272227 is a prime.

Together with 51273253, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51273251.

It is not a weakly prime, because it can be changed into another prime (51273253) 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, 25636625 + 25636626.

It is an arithmetic number, because the mean of its divisors is an integer number (25636626).

Almost surely, 2^51273251 is an apocalyptic number.

51273251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51273251 is an equidigital number, since it uses as much as digits as its factorization.

51273251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 26.

The square root of 51273251 is about 7160.5342677764. The cubic root of 51273251 is about 371.5041061722.

The spelling of 51273251 in words is "fifty-one million, two hundred seventy-three thousand, two hundred fifty-one".