2555444321 has 2 divisors, whose sum is σ = 2555444322. Its totient is φ = 2555444320.

The previous prime is 2555444219. The next prime is 2555444357. The reversal of 2555444321 is 1234445552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1486873600 + 1068570721 = 38560^2 + 32689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2555444321 is a prime.

It is not a weakly prime, because it can be changed into another prime (2555444621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277722160 + 1277722161.

It is an arithmetic number, because the mean of its divisors is an integer number (1277722161).

Almost surely, 2^2555444321 is an apocalyptic number.

It is an amenable number.

2555444321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555444321 is an equidigital number, since it uses as much as digits as its factorization.

2555444321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96000, while the sum is 35.

The square root of 2555444321 is about 50551.4027599631. The cubic root of 2555444321 is about 1367.1688066044.

Adding to 2555444321 its reverse (1234445552), we get a palindrome (3789889873).

The spelling of 2555444321 in words is "two billion, five hundred fifty-five million, four hundred forty-four thousand, three hundred twenty-one".