2544331321 has 6 divisors (see below), whose sum is σ = 2959732410. Its totient is φ = 2180855376.

The previous prime is 2544331291. The next prime is 2544331337. The reversal of 2544331321 is 1231334452.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2247802921 + 296528400 = 47411^2 + 17220^2 .

It is not a de Polignac number, because 2544331321 - 2⁷ = 2544331193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2544331321.

It is not an unprimeable number, because it can be changed into a prime (2544331121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25962516 + ... + 25962613.

It is an arithmetic number, because the mean of its divisors is an integer number (493288735).

Almost surely, 2^2544331321 is an apocalyptic number.

It is an amenable number.

2544331321 is a deficient number, since it is larger than the sum of its proper divisors (415401089).

2544331321 is an equidigital number, since it uses as much as digits as its factorization.

2544331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51925143 (or 51925136 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 2544331321 is about 50441.3651777983. The cubic root of 2544331321 is about 1365.1840996486.

Adding to 2544331321 its reverse (1231334452), we get a palindrome (3775665773).

The spelling of 2544331321 in words is "two billion, five hundred forty-four million, three hundred thirty-one thousand, three hundred twenty-one".