2199965 has 8 divisors (see below), whose sum is σ = 2683608. Its totient is φ = 1730880.

The previous prime is 2199961. The next prime is 2199971. The reversal of 2199965 is 5699912.

It can be written as a sum of positive squares in 4 ways, for example, as 85849 + 2114116 = 293^2 + 1454^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2199965 - 2² = 2199961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199961) 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, 3302 + ... + 3911.

It is an arithmetic number, because the mean of its divisors is an integer number (335451).

2^2199965 is an apocalyptic number.

It is an amenable number.

2199965 is a deficient number, since it is larger than the sum of its proper divisors (483643).

2199965 is an equidigital number, since it uses as much as digits as its factorization.

2199965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279.

The product of its digits is 43740, while the sum is 41.

The square root of 2199965 is about 1483.2278988746. The cubic root of 2199965 is about 130.0584549739.

The spelling of 2199965 in words is "two million, one hundred ninety-nine thousand, nine hundred sixty-five".