551891311 has 2 divisors, whose sum is σ = 551891312. Its totient is φ = 551891310.

The previous prime is 551891293. The next prime is 551891317. The reversal of 551891311 is 113198155.

It is a happy number.

551891311 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 551891311 - 2¹³ = 551883119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551891317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275945655 + 275945656.

It is an arithmetic number, because the mean of its divisors is an integer number (275945656).

Almost surely, 2^551891311 is an apocalyptic number.

551891311 is a deficient number, since it is larger than the sum of its proper divisors (1).

551891311 is an equidigital number, since it uses as much as digits as its factorization.

551891311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 34.

The square root of 551891311 is about 23492.3670795431. The cubic root of 551891311 is about 820.2593424185.

The spelling of 551891311 in words is "five hundred fifty-one million, eight hundred ninety-one thousand, three hundred eleven".