219801 has 8 divisors (see below), whose sum is σ = 300384. Its totient is φ = 142880.

The previous prime is 219799. The next prime is 219809. The reversal of 219801 is 108912.

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 219801 - 2¹ = 219799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771 + ... + 1016.

It is an arithmetic number, because the mean of its divisors is an integer number (37548).

2²¹⁹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

219801 is a deficient number, since it is larger than the sum of its proper divisors (80583).

219801 is a wasteful number, since it uses less digits than its factorization.

219801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 219801 is about 468.8293932765. The cubic root of 219801 is about 60.3498999780.

Subtracting from 219801 its reverse (108912), we obtain a square (110889 = 333²).

The spelling of 219801 in words is "two hundred nineteen thousand, eight hundred one".