2003221531 has 2 divisors, whose sum is σ = 2003221532. Its totient is φ = 2003221530.

The previous prime is 2003221481. The next prime is 2003221541. The reversal of 2003221531 is 1351223002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2003221531 - 2¹⁷ = 2003090459 is a prime.

It is a super-2 number, since 2×2003221531² = 8025793004523967922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2003221499 and 2003221508.

It is not a weakly prime, because it can be changed into another prime (2003221541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001610765 + 1001610766.

It is an arithmetic number, because the mean of its divisors is an integer number (1001610766).

Almost surely, 2^2003221531 is an apocalyptic number.

2003221531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2003221531 is an equidigital number, since it uses as much as digits as its factorization.

2003221531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 2003221531 is about 44757.3628691414. The cubic root of 2003221531 is about 1260.5971661231.

Adding to 2003221531 its reverse (1351223002), we get a palindrome (3354444533).

The spelling of 2003221531 in words is "two billion, three million, two hundred twenty-one thousand, five hundred thirty-one".