855311 has 2 divisors, whose sum is σ = 855312. Its totient is φ = 855310.

The previous prime is 855307. The next prime is 855317. The reversal of 855311 is 113558.

855311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855311 - 2² = 855307 is a prime.

It is a super-3 number, since 3×855311³ = 1877126008333335693, which contains 333 as substring.

It is a Chen prime.

It is an Ulam number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427655 + 427656.

It is an arithmetic number, because the mean of its divisors is an integer number (427656).

2⁸⁵⁵³¹¹ is an apocalyptic number.

855311 is a deficient number, since it is larger than the sum of its proper divisors (1).

855311 is an equidigital number, since it uses as much as digits as its factorization.

855311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 855311 is about 924.8302546954. The cubic root of 855311 is about 94.9237060582.

Adding to 855311 its reverse (113558), we get a palindrome (968869).

The spelling of 855311 in words is "eight hundred fifty-five thousand, three hundred eleven".