51500344513 has 2 divisors, whose sum is σ = 51500344514. Its totient is φ = 51500344512.

The previous prime is 51500344471. The next prime is 51500344529. The reversal of 51500344513 is 31544300515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39725273344 + 11775071169 = 199312^2 + 108513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51500344513 is a prime.

It is not a weakly prime, because it can be changed into another prime (51500344013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25750172256 + 25750172257.

It is an arithmetic number, because the mean of its divisors is an integer number (25750172257).

Almost surely, 2^51500344513 is an apocalyptic number.

It is an amenable number.

51500344513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51500344513 is an equidigital number, since it uses as much as digits as its factorization.

51500344513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 51500344513 in words is "fifty-one billion, five hundred million, three hundred forty-four thousand, five hundred thirteen".