205419 has 4 divisors (see below), whose sum is σ = 273896. Its totient is φ = 136944.

The previous prime is 205417. The next prime is 205421. The reversal of 205419 is 914502.

205419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (205417) and next prime (205421).

It is not a de Polignac number, because 205419 - 2¹ = 205417 is a prime.

It is a super-2 number, since 2×205419² = 84393931122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205395 and 205404.

It is not an unprimeable number, because it can be changed into a prime (205417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34234 + ... + 34239.

It is an arithmetic number, because the mean of its divisors is an integer number (68474).

205419 is a Friedman number, since it can be written as 59^(2+1)+40, using all its digits and the basic arithmetic operations.

2²⁰⁵⁴¹⁹ is an apocalyptic number.

205419 is a deficient number, since it is larger than the sum of its proper divisors (68477).

205419 is an equidigital number, since it uses as much as digits as its factorization.

205419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68476.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 205419 is about 453.2317288099. The cubic root of 205419 is about 59.0038300683.

The spelling of 205419 in words is "two hundred five thousand, four hundred nineteen".