551221271 has 2 divisors, whose sum is σ = 551221272. Its totient is φ = 551221270.

The previous prime is 551221219. The next prime is 551221283. The reversal of 551221271 is 172122155.

551221271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551221271 - 2¹⁴ = 551204887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551221271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551221211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275610635 + 275610636.

It is an arithmetic number, because the mean of its divisors is an integer number (275610636).

Almost surely, 2^551221271 is an apocalyptic number.

551221271 is a deficient number, since it is larger than the sum of its proper divisors (1).

551221271 is an equidigital number, since it uses as much as digits as its factorization.

551221271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1400, while the sum is 26.

The square root of 551221271 is about 23478.1019462818. The cubic root of 551221271 is about 819.9272546016.

The spelling of 551221271 in words is "five hundred fifty-one million, two hundred twenty-one thousand, two hundred seventy-one".