6423551 has 2 divisors, whose sum is σ = 6423552. Its totient is φ = 6423550.

The previous prime is 6423523. The next prime is 6423553. The reversal of 6423551 is 1553246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6423551 - 2²² = 2229247 is a prime.

Together with 6423553, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6423551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6423553) 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, 3211775 + 3211776.

It is an arithmetic number, because the mean of its divisors is an integer number (3211776).

Almost surely, 2^6423551 is an apocalyptic number.

6423551 is a deficient number, since it is larger than the sum of its proper divisors (1).

6423551 is an equidigital number, since it uses as much as digits as its factorization.

6423551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 6423551 is about 2534.4725289496. The cubic root of 6423551 is about 185.8910121900.

Adding to 6423551 its reverse (1553246), we get a palindrome (7976797).

The spelling of 6423551 in words is "six million, four hundred twenty-three thousand, five hundred fifty-one".