51437251 has 2 divisors, whose sum is σ = 51437252. Its totient is φ = 51437250.

The previous prime is 51437219. The next prime is 51437263. The reversal of 51437251 is 15273415.

It is a happy number.

51437251 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 51437251 - 2⁵ = 51437219 is a prime.

It is not a weakly prime, because it can be changed into another prime (51437051) 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, 25718625 + 25718626.

It is an arithmetic number, because the mean of its divisors is an integer number (25718626).

Almost surely, 2^51437251 is an apocalyptic number.

51437251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51437251 is an equidigital number, since it uses as much as digits as its factorization.

51437251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 28.

The square root of 51437251 is about 7171.9767846808. The cubic root of 51437251 is about 371.8997759639.

The spelling of 51437251 in words is "fifty-one million, four hundred thirty-seven thousand, two hundred fifty-one".