2199819 has 4 divisors (see below), whose sum is σ = 2933096. Its totient is φ = 1466544.

The previous prime is 2199803. The next prime is 2199823. The reversal of 2199819 is 9189912.

It is a happy number.

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

It is not a de Polignac number, because 2199819 - 2⁴ = 2199803 is a prime.

It is a super-2 number, since 2×2199819² = 9678407265522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2199859) 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, 366634 + ... + 366639.

It is an arithmetic number, because the mean of its divisors is an integer number (733274).

2^2199819 is an apocalyptic number.

2199819 is a deficient number, since it is larger than the sum of its proper divisors (733277).

2199819 is an equidigital number, since it uses as much as digits as its factorization.

2199819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733276.

The product of its digits is 11664, while the sum is 39.

The square root of 2199819 is about 1483.1786810766. The cubic root of 2199819 is about 130.0555778138.

The spelling of 2199819 in words is "two million, one hundred ninety-nine thousand, eight hundred nineteen".