203166 has 12 divisors (see below), whose sum is σ = 440232. Its totient is φ = 67716.

The previous prime is 203141. The next prime is 203173. The reversal of 203166 is 661302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11287 = 203166 / (2 + 0 + 3 + 1 + 6 + 6).

It is a congruent number.

It is an unprimeable number.

203166 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5626 + ... + 5661.

It is an arithmetic number, because the mean of its divisors is an integer number (36686).

2²⁰³¹⁶⁶ is an apocalyptic number.

203166 is an abundant number, since it is smaller than the sum of its proper divisors (237066).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203166 is a wasteful number, since it uses less digits than its factorization.

203166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11295 (or 11292 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 203166 is about 450.7393925541. The cubic root of 203166 is about 58.7873219925.

Adding to 203166 its reverse (661302), we get a palindrome (864468).

The spelling of 203166 in words is "two hundred three thousand, one hundred sixty-six".