2115599 has 4 divisors (see below), whose sum is σ = 2240064. Its totient is φ = 1991136.

The previous prime is 2115571. The next prime is 2115629. The reversal of 2115599 is 9955112.

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 2115599 - 2⁸ = 2115343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62207 + ... + 62240.

It is an arithmetic number, because the mean of its divisors is an integer number (560016).

2^2115599 is an apocalyptic number.

2115599 is a deficient number, since it is larger than the sum of its proper divisors (124465).

2115599 is a wasteful number, since it uses less digits than its factorization.

2115599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124464.

The product of its digits is 4050, while the sum is 32.

The square root of 2115599 is about 1454.5098830878. The cubic root of 2115599 is about 128.3742101003.

The spelling of 2115599 in words is "two million, one hundred fifteen thousand, five hundred ninety-nine".