2219915 has 4 divisors (see below), whose sum is σ = 2663904. Its totient is φ = 1775928.

The previous prime is 2219887. The next prime is 2219923. The reversal of 2219915 is 5199122.

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-2219915 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221987 + ... + 221996.

It is an arithmetic number, because the mean of its divisors is an integer number (665976).

2^2219915 is an apocalyptic number.

2219915 is a deficient number, since it is larger than the sum of its proper divisors (443989).

2219915 is an equidigital number, since it uses as much as digits as its factorization.

2219915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443988.

The product of its digits is 1620, while the sum is 29.

The square root of 2219915 is about 1489.9379181697. The cubic root of 2219915 is about 130.4504100519.

The spelling of 2219915 in words is "two million, two hundred nineteen thousand, nine hundred fifteen".