205190 has 24 divisors (see below), whose sum is σ = 397872. Its totient is φ = 76160.

The previous prime is 205187. The next prime is 205201. The reversal of 205190 is 91502.

It is a super-2 number, since 2×205190² = 84205872200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2855 + ... + 2925.

It is an arithmetic number, because the mean of its divisors is an integer number (16578).

2²⁰⁵¹⁹⁰ is an apocalyptic number.

205190 is a deficient number, since it is larger than the sum of its proper divisors (192682).

205190 is a wasteful number, since it uses less digits than its factorization.

205190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 205190 is about 452.9790282121. The cubic root of 205190 is about 58.9818961979.

Adding to 205190 its reverse (91502), we get a palindrome (296692).

The spelling of 205190 in words is "two hundred five thousand, one hundred ninety".