2144451255521 has 2 divisors, whose sum is σ = 2144451255522. Its totient is φ = 2144451255520.

The previous prime is 2144451255511. The next prime is 2144451255571. The reversal of 2144451255521 is 1255521544412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1879885045921 + 264566209600 = 1371089^2 + 514360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144451255521 is a prime.

It is not a weakly prime, because it can be changed into another prime (2144451255511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072225627760 + 1072225627761.

It is an arithmetic number, because the mean of its divisors is an integer number (1072225627761).

Almost surely, 2^{2144451255521} is an apocalyptic number.

It is an amenable number.

2144451255521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144451255521 is an equidigital number, since it uses as much as digits as its factorization.

2144451255521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320000, while the sum is 41.

Adding to 2144451255521 its reverse (1255521544412), we get a palindrome (3399972799933).

The spelling of 2144451255521 in words is "two trillion, one hundred forty-four billion, four hundred fifty-one million, two hundred fifty-five thousand, five hundred twenty-one".