2855819 has 2 divisors, whose sum is σ = 2855820. Its totient is φ = 2855818.

The previous prime is 2855807. The next prime is 2855843. The reversal of 2855819 is 9185582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2855819 - 2²⁰ = 1807243 is a prime.

It is a super-2 number, since 2×2855819² = 16311404321522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2855869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1427909 + 1427910.

It is an arithmetic number, because the mean of its divisors is an integer number (1427910).

2^2855819 is an apocalyptic number.

2855819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2855819 is an equidigital number, since it uses as much as digits as its factorization.

2855819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 38.

The square root of 2855819 is about 1689.9168618604. The cubic root of 2855819 is about 141.8764216124.

The spelling of 2855819 in words is "two million, eight hundred fifty-five thousand, eight hundred nineteen".