5215443254321 has 2 divisors, whose sum is σ = 5215443254322. Its totient is φ = 5215443254320.

The previous prime is 5215443254291. The next prime is 5215443254363. The reversal of 5215443254321 is 1234523445125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3819831804721 + 1395611449600 = 1954439^2 + 1181360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5215443254321 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 (5215443254521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2607721627160 + 2607721627161.

It is an arithmetic number, because the mean of its divisors is an integer number (2607721627161).

Almost surely, 2^{5215443254321} is an apocalyptic number.

It is an amenable number.

5215443254321 is a deficient number, since it is larger than the sum of its proper divisors (1).

5215443254321 is an equidigital number, since it uses as much as digits as its factorization.

5215443254321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 41.

Adding to 5215443254321 its reverse (1234523445125), we get a palindrome (6449966699446).

The spelling of 5215443254321 in words is "five trillion, two hundred fifteen billion, four hundred forty-three million, two hundred fifty-four thousand, three hundred twenty-one".