551311 has 2 divisors, whose sum is σ = 551312. Its totient is φ = 551310.

The previous prime is 551297. The next prime is 551321. The reversal of 551311 is 113155.

551311 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 551311 - 2¹⁵ = 518543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275655 + 275656.

It is an arithmetic number, because the mean of its divisors is an integer number (275656).

2⁵⁵¹³¹¹ is an apocalyptic number.

551311 is a deficient number, since it is larger than the sum of its proper divisors (1).

551311 is an equidigital number, since it uses as much as digits as its factorization.

551311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75, while the sum is 16.

The square root of 551311 is about 742.5031986463. The cubic root of 551311 is about 81.9971742036.

Adding to 551311 its reverse (113155), we get a palindrome (664466).

The spelling of 551311 in words is "five hundred fifty-one thousand, three hundred eleven".