219049 has 4 divisors (see below), whose sum is σ = 223236. Its totient is φ = 214864.

The previous prime is 219041. The next prime is 219053. The reversal of 219049 is 940912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160000 + 59049 = 400^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 219049 - 2³ = 219041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (219041) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2014 + ... + 2119.

It is an arithmetic number, because the mean of its divisors is an integer number (55809).

2²¹⁹⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

219049 is a deficient number, since it is larger than the sum of its proper divisors (4187).

219049 is an equidigital number, since it uses as much as digits as its factorization.

219049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 219049 is about 468.0267086396. The cubic root of 219049 is about 60.2809967740.

Subtracting from 219049 its sum of digits (25), we obtain a square (219024 = 468²).

It can be divided in two parts, 21904 and 9, that multiplied together give a square (197136 = 444²).

The spelling of 219049 in words is "two hundred nineteen thousand, forty-nine".