51207553513 has 2 divisors, whose sum is σ = 51207553514. Its totient is φ = 51207553512.

The previous prime is 51207553471. The next prime is 51207553549. The reversal of 51207553513 is 31535570215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39128004864 + 12079548649 = 197808^2 + 109907^2 .

It is a cyclic number.

It is not a de Polignac number, because 51207553513 - 2²⁵ = 51173999081 is a prime.

It is not a weakly prime, because it can be changed into another prime (51207553613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25603776756 + 25603776757.

It is an arithmetic number, because the mean of its divisors is an integer number (25603776757).

Almost surely, 2^51207553513 is an apocalyptic number.

It is an amenable number.

51207553513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51207553513 is an equidigital number, since it uses as much as digits as its factorization.

51207553513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78750, while the sum is 37.

The spelling of 51207553513 in words is "fifty-one billion, two hundred seven million, five hundred fifty-three thousand, five hundred thirteen".