2189915 has 16 divisors (see below), whose sum is σ = 3235008. Its totient is φ = 1385856.

The previous prime is 2189881. The next prime is 2189939. The reversal of 2189915 is 5199812.

2189915 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 2189915 - 2¹⁴ = 2173531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is an unprimeable number.

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, 1952 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (202188).

2^2189915 is an apocalyptic number.

2189915 is a deficient number, since it is larger than the sum of its proper divisors (1045093).

2189915 is a wasteful number, since it uses less digits than its factorization.

2189915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4838.

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

The square root of 2189915 is about 1479.8361395776. The cubic root of 2189915 is about 129.8601059231.

The spelling of 2189915 in words is "two million, one hundred eighty-nine thousand, nine hundred fifteen".