551421443 has 2 divisors, whose sum is σ = 551421444. Its totient is φ = 551421442.

The previous prime is 551421433. The next prime is 551421449. The reversal of 551421443 is 344124155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551421443 - 2²² = 547227139 is a prime.

It is not a weakly prime, because it can be changed into another prime (551421449) 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, 275710721 + 275710722.

It is an arithmetic number, because the mean of its divisors is an integer number (275710722).

Almost surely, 2^551421443 is an apocalyptic number.

551421443 is a deficient number, since it is larger than the sum of its proper divisors (1).

551421443 is an equidigital number, since it uses as much as digits as its factorization.

551421443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 551421443 is about 23482.3645104150. The cubic root of 551421443 is about 820.0264927986.

Adding to 551421443 its reverse (344124155), we get a palindrome (895545598).

The spelling of 551421443 in words is "five hundred fifty-one million, four hundred twenty-one thousand, four hundred forty-three".