2199281 has 16 divisors (see below), whose sum is σ = 2634240. Its totient is φ = 1797120.

The previous prime is 2199277. The next prime is 2199299. The reversal of 2199281 is 1829912.

It is a happy number.

2199281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2199281 - 2² = 2199277 is a prime.

It is a super-2 number, since 2×2199281² = 9673673833922, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2199221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22625 + ... + 22721.

It is an arithmetic number, because the mean of its divisors is an integer number (164640).

2^2199281 is an apocalyptic number.

It is an amenable number.

2199281 is a deficient number, since it is larger than the sum of its proper divisors (434959).

2199281 is an equidigital number, since it uses as much as digits as its factorization.

2199281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224.

The product of its digits is 2592, while the sum is 32.

The square root of 2199281 is about 1482.9973027622. The cubic root of 2199281 is about 130.0449745769.

The spelling of 2199281 in words is "two million, one hundred ninety-nine thousand, two hundred eighty-one".