51422143 has 2 divisors, whose sum is σ = 51422144. Its totient is φ = 51422142.

The previous prime is 51422141. The next prime is 51422171. The reversal of 51422143 is 34122415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51422143 - 2¹ = 51422141 is a prime.

Together with 51422141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51422141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25711071 + 25711072.

It is an arithmetic number, because the mean of its divisors is an integer number (25711072).

Almost surely, 2^51422143 is an apocalyptic number.

51422143 is a deficient number, since it is larger than the sum of its proper divisors (1).

51422143 is an equidigital number, since it uses as much as digits as its factorization.

51422143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 51422143 is about 7170.9234412313. The cubic root of 51422143 is about 371.8633612910.

Adding to 51422143 its reverse (34122415), we get a palindrome (85544558).

The spelling of 51422143 in words is "fifty-one million, four hundred twenty-two thousand, one hundred forty-three".