201803 has 8 divisors (see below), whose sum is σ = 233472. Its totient is φ = 170856.

The previous prime is 201797. The next prime is 201809. The reversal of 201803 is 308102.

It is an interprime number because it is at equal distance from previous prime (201797) and next prime (201809).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201803 - 2⁴ = 201787 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776 + ... + 1002.

It is an arithmetic number, because the mean of its divisors is an integer number (29184).

2²⁰¹⁸⁰³ is an apocalyptic number.

201803 is a deficient number, since it is larger than the sum of its proper divisors (31669).

201803 is a wasteful number, since it uses less digits than its factorization.

201803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 201803 is about 449.2248880015. The cubic root of 201803 is about 58.6555627803.

Adding to 201803 its reverse (308102), we get a palindrome (509905).

The spelling of 201803 in words is "two hundred one thousand, eight hundred three".