2199918 has 16 divisors (see below), whose sum is σ = 5028480. Its totient is φ = 628536.

The previous prime is 2199917. The next prime is 2199931. The reversal of 2199918 is 8199912.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26148 + ... + 26231.

It is an arithmetic number, because the mean of its divisors is an integer number (314280).

2^2199918 is an apocalyptic number.

2199918 is an abundant number, since it is smaller than the sum of its proper divisors (2828562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2199918 is a wasteful number, since it uses less digits than its factorization.

2199918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52391.

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

The square root of 2199918 is about 1483.2120549672. The cubic root of 2199918 is about 130.0575287787.

The spelling of 2199918 in words is "two million, one hundred ninety-nine thousand, nine hundred eighteen".