51966143 has 2 divisors, whose sum is σ = 51966144. Its totient is φ = 51966142.

The previous prime is 51966119. The next prime is 51966149. The reversal of 51966143 is 34166915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51966143 - 2²⁴ = 35188927 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51966149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25983071 + 25983072.

It is an arithmetic number, because the mean of its divisors is an integer number (25983072).

Almost surely, 2^51966143 is an apocalyptic number.

51966143 is a deficient number, since it is larger than the sum of its proper divisors (1).

51966143 is an equidigital number, since it uses as much as digits as its factorization.

51966143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 35.

The square root of 51966143 is about 7208.7546081137. The cubic root of 51966143 is about 373.1700906389.

The spelling of 51966143 in words is "fifty-one million, nine hundred sixty-six thousand, one hundred forty-three".