2002544321 has 2 divisors, whose sum is σ = 2002544322. Its totient is φ = 2002544320.

The previous prime is 2002544281. The next prime is 2002544353. The reversal of 2002544321 is 1234452002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1799880625 + 202663696 = 42425^2 + 14236^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002544321 - 2¹⁰ = 2002543297 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002544371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001272160 + 1001272161.

It is an arithmetic number, because the mean of its divisors is an integer number (1001272161).

Almost surely, 2^2002544321 is an apocalyptic number.

It is an amenable number.

2002544321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002544321 is an equidigital number, since it uses as much as digits as its factorization.

2002544321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 2002544321 is about 44749.7968822206. The cubic root of 2002544321 is about 1260.4550974251.

Adding to 2002544321 its reverse (1234452002), we get a palindrome (3236996323).

It can be divided in two parts, 20025 and 44321, that added together give a palindrome (64346).

The spelling of 2002544321 in words is "two billion, two million, five hundred forty-four thousand, three hundred twenty-one".