51500344537 has 2 divisors, whose sum is σ = 51500344538. Its totient is φ = 51500344536.

The previous prime is 51500344529. The next prime is 51500344541. The reversal of 51500344537 is 73544300515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32999992281 + 18500352256 = 181659^2 + 136016^2 .

It is a cyclic number.

It is not a de Polignac number, because 51500344537 - 2³ = 51500344529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51500344496 and 51500344505.

It is not a weakly prime, because it can be changed into another prime (51500644537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25750172268 + 25750172269.

It is an arithmetic number, because the mean of its divisors is an integer number (25750172269).

Almost surely, 2^51500344537 is an apocalyptic number.

It is an amenable number.

51500344537 is a deficient number, since it is larger than the sum of its proper divisors (1).

51500344537 is an equidigital number, since it uses as much as digits as its factorization.

51500344537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126000, while the sum is 37.

The spelling of 51500344537 in words is "fifty-one billion, five hundred million, three hundred forty-four thousand, five hundred thirty-seven".