2255819 has 4 divisors (see below), whose sum is σ = 2275896. Its totient is φ = 2235744.

The previous prime is 2255797. The next prime is 2255821. The reversal of 2255819 is 9185522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2255819 is a prime.

It is a super-2 number, since 2×2255819² = 10177438721522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2255899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9869 + ... + 10094.

It is an arithmetic number, because the mean of its divisors is an integer number (568974).

2^2255819 is an apocalyptic number.

2255819 is a deficient number, since it is larger than the sum of its proper divisors (20077).

2255819 is a wasteful number, since it uses less digits than its factorization.

2255819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20076.

The product of its digits is 7200, while the sum is 32.

The square root of 2255819 is about 1501.9384141835. The cubic root of 2255819 is about 131.1499361276.

The spelling of 2255819 in words is "two million, two hundred fifty-five thousand, eight hundred nineteen".