2219421 has 8 divisors (see below), whose sum is σ = 2976480. Its totient is φ = 1470992.

The previous prime is 2219411. The next prime is 2219423. The reversal of 2219421 is 1249122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2219421 - 2¹⁷ = 2088349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1530 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (372060).

2^2219421 is an apocalyptic number.

It is an amenable number.

2219421 is a deficient number, since it is larger than the sum of its proper divisors (757059).

2219421 is a wasteful number, since it uses less digits than its factorization.

2219421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315.

The product of its digits is 288, while the sum is 21.

The square root of 2219421 is about 1489.7721302266. The cubic root of 2219421 is about 130.4407329121.

Subtracting from 2219421 its reverse (1249122), we obtain a cube (970299 = 99³).

The spelling of 2219421 in words is "two million, two hundred nineteen thousand, four hundred twenty-one".