551504543 has 2 divisors, whose sum is σ = 551504544. Its totient is φ = 551504542.

The previous prime is 551504521. The next prime is 551504563. The reversal of 551504543 is 345405155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551504543 is a prime.

It is a super-3 number, since 3×551504543³ (a number of 27 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551504563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275752271 + 275752272.

It is an arithmetic number, because the mean of its divisors is an integer number (275752272).

Almost surely, 2^551504543 is an apocalyptic number.

551504543 is a deficient number, since it is larger than the sum of its proper divisors (1).

551504543 is an equidigital number, since it uses as much as digits as its factorization.

551504543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 551504543 is about 23484.1338567127. The cubic root of 551504543 is about 820.0676837846.

Adding to 551504543 its reverse (345405155), we get a palindrome (896909698).

The spelling of 551504543 in words is "five hundred fifty-one million, five hundred four thousand, five hundred forty-three".