2003221481 has 2 divisors, whose sum is σ = 2003221482. Its totient is φ = 2003221480.

The previous prime is 2003221463. The next prime is 2003221531. The reversal of 2003221481 is 1841223002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879656025 + 123565456 = 43355^2 + 11116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2003221481 is a prime.

It is a super-2 number, since 2×2003221481² = 8025792603879666722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2003221421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001610740 + 1001610741.

It is an arithmetic number, because the mean of its divisors is an integer number (1001610741).

Almost surely, 2^2003221481 is an apocalyptic number.

It is an amenable number.

2003221481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003221481 is an equidigital number, since it uses as much as digits as its factorization.

2003221481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2003221481 is about 44757.3623105741. The cubic root of 2003221481 is about 1260.5971556350.

Adding to 2003221481 its reverse (1841223002), we get a palindrome (3844444483).

The spelling of 2003221481 in words is "two billion, three million, two hundred twenty-one thousand, four hundred eighty-one".