203172 has 12 divisors (see below), whose sum is σ = 474096. Its totient is φ = 67720.

The previous prime is 203141. The next prime is 203173. The reversal of 203172 is 271302.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×203172³ = 25160126597233344, which contains 333 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 203172.

It is not an unprimeable number, because it can be changed into a prime (203173) 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, 8454 + ... + 8477.

It is an arithmetic number, because the mean of its divisors is an integer number (39508).

2²⁰³¹⁷² is an apocalyptic number.

It is an amenable number.

203172 is an abundant number, since it is smaller than the sum of its proper divisors (270924).

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

203172 is a wasteful number, since it uses less digits than its factorization.

203172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16938 (or 16936 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 203172 is about 450.7460482356. The cubic root of 203172 is about 58.7879006990.

Adding to 203172 its reverse (271302), we get a palindrome (474474).

The spelling of 203172 in words is "two hundred three thousand, one hundred seventy-two", and thus it is an iban number.