2551445321 has 2 divisors, whose sum is σ = 2551445322. Its totient is φ = 2551445320.

The previous prime is 2551445287. The next prime is 2551445327. The reversal of 2551445321 is 1235441552.

2551445321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2240980921 + 310464400 = 47339^2 + 17620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551445321 - 2⁶ = 2551445257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2551445327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275722660 + 1275722661.

It is an arithmetic number, because the mean of its divisors is an integer number (1275722661).

Almost surely, 2^2551445321 is an apocalyptic number.

It is an amenable number.

2551445321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551445321 is an equidigital number, since it uses as much as digits as its factorization.

2551445321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24000, while the sum is 32.

The square root of 2551445321 is about 50511.8334749393. The cubic root of 2551445321 is about 1366.4552760957.

Adding to 2551445321 its reverse (1235441552), we get a palindrome (3786886873).

The spelling of 2551445321 in words is "two billion, five hundred fifty-one million, four hundred forty-five thousand, three hundred twenty-one".