551243227 has 2 divisors, whose sum is σ = 551243228. Its totient is φ = 551243226.

The previous prime is 551243179. The next prime is 551243243. The reversal of 551243227 is 722342155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551243227 - 2¹¹ = 551241179 is a prime.

It is not a weakly prime, because it can be changed into another prime (551243027) 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, 275621613 + 275621614.

It is an arithmetic number, because the mean of its divisors is an integer number (275621614).

Almost surely, 2^551243227 is an apocalyptic number.

551243227 is a deficient number, since it is larger than the sum of its proper divisors (1).

551243227 is an equidigital number, since it uses as much as digits as its factorization.

551243227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 31.

The square root of 551243227 is about 23478.5695262723. The cubic root of 551243227 is about 819.9381407827.

The spelling of 551243227 in words is "five hundred fifty-one million, two hundred forty-three thousand, two hundred twenty-seven".