422551 has 2 divisors, whose sum is σ = 422552. Its totient is φ = 422550.

The previous prime is 422549. The next prime is 422557. The reversal of 422551 is 155224.

422551 is nontrivially palindromic in base 5.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 422551 - 2¹ = 422549 is a prime.

Together with 422549, 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 (422557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211275 + 211276.

It is an arithmetic number, because the mean of its divisors is an integer number (211276).

2⁴²²⁵⁵¹ is an apocalyptic number.

422551 is a deficient number, since it is larger than the sum of its proper divisors (1).

422551 is an equidigital number, since it uses as much as digits as its factorization.

422551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 400, while the sum is 19.

The square root of 422551 is about 650.0392295854. The cubic root of 422551 is about 75.0400378817.

Adding to 422551 its reverse (155224), we get a palindrome (577775).

The spelling of 422551 in words is "four hundred twenty-two thousand, five hundred fifty-one".