51325500647 has 2 divisors, whose sum is σ = 51325500648. Its totient is φ = 51325500646.

The previous prime is 51325500643. The next prime is 51325500671. The reversal of 51325500647 is 74600552315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51325500647 - 2² = 51325500643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51325500647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51325500643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25662750323 + 25662750324.

It is an arithmetic number, because the mean of its divisors is an integer number (25662750324).

Almost surely, 2^51325500647 is an apocalyptic number.

51325500647 is a deficient number, since it is larger than the sum of its proper divisors (1).

51325500647 is an equidigital number, since it uses as much as digits as its factorization.

51325500647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126000, while the sum is 38.

The spelling of 51325500647 in words is "fifty-one billion, three hundred twenty-five million, five hundred thousand, six hundred forty-seven".