2115899 has 4 divisors (see below), whose sum is σ = 2119320. Its totient is φ = 2112480.

The previous prime is 2115877. The next prime is 2115923. The reversal of 2115899 is 9985112.

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

It is a cyclic number.

It is not a de Polignac number, because 2115899 - 2¹² = 2111803 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115829) 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, 494 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (529830).

2^2115899 is an apocalyptic number.

2115899 is a deficient number, since it is larger than the sum of its proper divisors (3421).

2115899 is an equidigital number, since it uses as much as digits as its factorization.

2115899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420.

The product of its digits is 6480, while the sum is 35.

The square root of 2115899 is about 1454.6130069541. The cubic root of 2115899 is about 128.3802777976.

The spelling of 2115899 in words is "two million, one hundred fifteen thousand, eight hundred ninety-nine".