219803421 has 16 divisors (see below), whose sum is σ = 318700224. Its totient is φ = 134187264.

The previous prime is 219803413. The next prime is 219803429. The reversal of 219803421 is 124308912.

It is an interprime number because it is at equal distance from previous prime (219803413) and next prime (219803429).

It is not a de Polignac number, because 219803421 - 2³ = 219803413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219803429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56355 + ... + 60128.

It is an arithmetic number, because the mean of its divisors is an integer number (19918764).

Almost surely, 2^219803421 is an apocalyptic number.

It is an amenable number.

219803421 is a deficient number, since it is larger than the sum of its proper divisors (98896803).

219803421 is a wasteful number, since it uses less digits than its factorization.

219803421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116540.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 219803421 is about 14825.7688164898. The cubic root of 219803421 is about 603.5012155205.

The spelling of 219803421 in words is "two hundred nineteen million, eight hundred three thousand, four hundred twenty-one".