225819 has 12 divisors (see below), whose sum is σ = 355992. Its totient is φ = 136800.

The previous prime is 225809. The next prime is 225821. The reversal of 225819 is 918522.

It is not a de Polignac number, because 225819 - 2⁹ = 225307 is a prime.

It is a super-2 number, since 2×225819² = 101988441522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225792 and 225801.

It is not an unprimeable number, because it can be changed into a prime (225809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1042 + ... + 1239.

It is an arithmetic number, because the mean of its divisors is an integer number (29666).

2²²⁵⁸¹⁹ is an apocalyptic number.

225819 is a deficient number, since it is larger than the sum of its proper divisors (130173).

225819 is a wasteful number, since it uses less digits than its factorization.

225819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298 (or 2295 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 225819 is about 475.2041666484. The cubic root of 225819 is about 60.8957279798.

The spelling of 225819 in words is "two hundred twenty-five thousand, eight hundred nineteen".