2821203 has 64 divisors (see below), whose sum is σ = 5529600. Its totient is φ = 1378080.

The previous prime is 2821183. The next prime is 2821229. The reversal of 2821203 is 3021282.

It is a happy number.

It is not a de Polignac number, because 2821203 - 2⁸ = 2820947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47788 + ... + 47846.

It is an arithmetic number, because the mean of its divisors is an integer number (86400).

2^2821203 is an apocalyptic number.

2821203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2821203 is a deficient number, since it is larger than the sum of its proper divisors (2708397).

2821203 is a wasteful number, since it uses less digits than its factorization.

2821203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2821203 is about 1679.6437122199. The cubic root of 2821203 is about 141.3008515056.

Adding to 2821203 its reverse (3021282), we get a palindrome (5842485).

It can be divided in two parts, 282 and 1203, that added together give a triangular number (1485 = T₅₄).

The spelling of 2821203 in words is "two million, eight hundred twenty-one thousand, two hundred three".