51020200013 has 2 divisors, whose sum is σ = 51020200014. Its totient is φ = 51020200012.

The previous prime is 51020199983. The next prime is 51020200051. The reversal of 51020200013 is 31000202015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43148429284 + 7871770729 = 207722^2 + 88723^2 .

It is a cyclic number.

It is not a de Polignac number, because 51020200013 - 2²⁶ = 50953091149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51020209013) 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, 25510100006 + 25510100007.

It is an arithmetic number, because the mean of its divisors is an integer number (25510100007).

Almost surely, 2^51020200013 is an apocalyptic number.

It is an amenable number.

51020200013 is a deficient number, since it is larger than the sum of its proper divisors (1).

51020200013 is an equidigital number, since it uses as much as digits as its factorization.

51020200013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

Adding to 51020200013 its reverse (31000202015), we get a palindrome (82020402028).

The spelling of 51020200013 in words is "fifty-one billion, twenty million, two hundred thousand, thirteen".