2115611 has 4 divisors (see below), whose sum is σ = 2160672. Its totient is φ = 2070552.

The previous prime is 2115571. The next prime is 2115629. The reversal of 2115611 is 1165112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2115611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2115611.

It is not an unprimeable number, because it can be changed into a prime (2115671) 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, 22460 + ... + 22553.

It is an arithmetic number, because the mean of its divisors is an integer number (540168).

2^2115611 is an apocalyptic number.

2115611 is a deficient number, since it is larger than the sum of its proper divisors (45061).

2115611 is an equidigital number, since it uses as much as digits as its factorization.

2115611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45060.

The product of its digits is 60, while the sum is 17.

The square root of 2115611 is about 1454.5140081828. The cubic root of 2115611 is about 128.3744528192.

The spelling of 2115611 in words is "two million, one hundred fifteen thousand, six hundred eleven".