2003281 has 8 divisors (see below), whose sum is σ = 2338560. Its totient is φ = 1680288.

The previous prime is 2003279. The next prime is 2003299. The reversal of 2003281 is 1823002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2003281 - 2¹ = 2003279 is a prime.

It is a super-2 number, since 2×2003281² = 8026269529922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003201) 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, 2716 + ... + 3373.

It is an arithmetic number, because the mean of its divisors is an integer number (292320).

2^2003281 is an apocalyptic number.

It is an amenable number.

2003281 is a deficient number, since it is larger than the sum of its proper divisors (335279).

2003281 is an equidigital number, since it uses as much as digits as its factorization.

2003281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6143.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2003281 is about 1415.3730956889. The cubic root of 2003281 is about 126.0609640315.

Adding to 2003281 its reverse (1823002), we get a palindrome (3826283).

It can be divided in two parts, 200 and 3281, that added together give a square (3481 = 59²).

The spelling of 2003281 in words is "two million, three thousand, two hundred eighty-one".