205170219 has 16 divisors (see below), whose sum is σ = 305827200. Its totient is φ = 135938088.

The previous prime is 205170211. The next prime is 205170233. The reversal of 205170219 is 912071502.

205170219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205170219 - 2³ = 205170211 is a prime.

It is a super-2 number, since 2×205170219² = 84189637529015922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 205170192 and 205170201.

It is not an unprimeable number, because it can be changed into a prime (205170211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18909 + ... + 27710.

It is an arithmetic number, because the mean of its divisors is an integer number (19114200).

Almost surely, 2^205170219 is an apocalyptic number.

205170219 is a deficient number, since it is larger than the sum of its proper divisors (100656981).

205170219 is a wasteful number, since it uses less digits than its factorization.

205170219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46791 (or 46785 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 205170219 is about 14323.7641351706. The cubic root of 205170219 is about 589.8000078651.

The spelling of 205170219 in words is "two hundred five million, one hundred seventy thousand, two hundred nineteen".