551255543 has 2 divisors, whose sum is σ = 551255544. Its totient is φ = 551255542.

The previous prime is 551255503. The next prime is 551255557. The reversal of 551255543 is 345552155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551255543 - 2⁶ = 551255479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551255503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275627771 + 275627772.

It is an arithmetic number, because the mean of its divisors is an integer number (275627772).

Almost surely, 2^551255543 is an apocalyptic number.

551255543 is a deficient number, since it is larger than the sum of its proper divisors (1).

551255543 is an equidigital number, since it uses as much as digits as its factorization.

551255543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75000, while the sum is 35.

The square root of 551255543 is about 23478.8318065444. The cubic root of 551255543 is about 819.9442471513.

The spelling of 551255543 in words is "five hundred fifty-one million, two hundred fifty-five thousand, five hundred forty-three".