51020509433 has 2 divisors, whose sum is σ = 51020509434. Its totient is φ = 51020509432.

The previous prime is 51020509399. The next prime is 51020509451. The reversal of 51020509433 is 33490502015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50972995984 + 47513449 = 225772^2 + 6893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51020509433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51020509433.

It is not a weakly prime, because it can be changed into another prime (51020503433) 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, 25510254716 + 25510254717.

It is an arithmetic number, because the mean of its divisors is an integer number (25510254717).

Almost surely, 2^51020509433 is an apocalyptic number.

It is an amenable number.

51020509433 is a deficient number, since it is larger than the sum of its proper divisors (1).

51020509433 is an equidigital number, since it uses as much as digits as its factorization.

51020509433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 51020509433 in words is "fifty-one billion, twenty million, five hundred nine thousand, four hundred thirty-three".