51422551 has 2 divisors, whose sum is σ = 51422552. Its totient is φ = 51422550.

The previous prime is 51422543. The next prime is 51422611. The reversal of 51422551 is 15522415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51422551 - 2³ = 51422543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51422251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25711275 + 25711276.

It is an arithmetic number, because the mean of its divisors is an integer number (25711276).

Almost surely, 2^51422551 is an apocalyptic number.

51422551 is a deficient number, since it is larger than the sum of its proper divisors (1).

51422551 is an equidigital number, since it uses as much as digits as its factorization.

51422551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2000, while the sum is 25.

The square root of 51422551 is about 7170.9518893938. The cubic root of 51422551 is about 371.8643447833.

Adding to 51422551 its reverse (15522415), we get a palindrome (66944966).

The spelling of 51422551 in words is "fifty-one million, four hundred twenty-two thousand, five hundred fifty-one".