51140320513 has 2 divisors, whose sum is σ = 51140320514. Its totient is φ = 51140320512.

The previous prime is 51140320501. The next prime is 51140320537. The reversal of 51140320513 is 31502304115.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50109717904 + 1030602609 = 223852^2 + 32103^2 .

It is a cyclic number.

It is not a de Polignac number, because 51140320513 - 2²⁹ = 50603449601 is a prime.

It is not a weakly prime, because it can be changed into another prime (51140320573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25570160256 + 25570160257.

It is an arithmetic number, because the mean of its divisors is an integer number (25570160257).

Almost surely, 2^51140320513 is an apocalyptic number.

It is an amenable number.

51140320513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51140320513 is an equidigital number, since it uses as much as digits as its factorization.

51140320513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 51140320513 its reverse (31502304115), we get a palindrome (82642624628).

The spelling of 51140320513 in words is "fifty-one billion, one hundred forty million, three hundred twenty thousand, five hundred thirteen".