551305423 has 4 divisors (see below), whose sum is σ = 575275248. Its totient is φ = 527335600.

The previous prime is 551305361. The next prime is 551305453. The reversal of 551305423 is 324503155.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 551305423 - 2¹³ = 551297231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551305391 and 551305400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551305453) 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 in 3 ways as a sum of consecutive naturals, for example, 11984878 + ... + 11984923.

It is an arithmetic number, because the mean of its divisors is an integer number (143818812).

Almost surely, 2^551305423 is an apocalyptic number.

551305423 is a deficient number, since it is larger than the sum of its proper divisors (23969825).

551305423 is a wasteful number, since it uses less digits than its factorization.

551305423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23969824.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 551305423 is about 23479.8940159448. The cubic root of 551305423 is about 819.9689771131.

Adding to 551305423 its reverse (324503155), we get a palindrome (875808578).

The spelling of 551305423 in words is "five hundred fifty-one million, three hundred five thousand, four hundred twenty-three".