51212535013 has 2 divisors, whose sum is σ = 51212535014. Its totient is φ = 51212535012.

The previous prime is 51212534993. The next prime is 51212535043. The reversal of 51212535013 is 31053521215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27908375364 + 23304159649 = 167058^2 + 152657^2 .

It is a cyclic number.

It is not a de Polignac number, because 51212535013 - 2⁹ = 51212534501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51212535043) 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, 25606267506 + 25606267507.

It is an arithmetic number, because the mean of its divisors is an integer number (25606267507).

Almost surely, 2^51212535013 is an apocalyptic number.

It is an amenable number.

51212535013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51212535013 is an equidigital number, since it uses as much as digits as its factorization.

51212535013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 51212535013 in words is "fifty-one billion, two hundred twelve million, five hundred thirty-five thousand, thirteen".