51002129 has 2 divisors, whose sum is σ = 51002130. Its totient is φ = 51002128.

The previous prime is 51002123. The next prime is 51002141. The reversal of 51002129 is 92120015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28912129 + 22090000 = 5377^2 + 4700^2 .

It is a cyclic number.

It is not a de Polignac number, because 51002129 - 2⁴ = 51002113 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51002129.

It is not a weakly prime, because it can be changed into another prime (51002123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25501064 + 25501065.

It is an arithmetic number, because the mean of its divisors is an integer number (25501065).

Almost surely, 2^51002129 is an apocalyptic number.

It is an amenable number.

51002129 is a deficient number, since it is larger than the sum of its proper divisors (1).

51002129 is an equidigital number, since it uses as much as digits as its factorization.

51002129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 51002129 is about 7141.5774868022. The cubic root of 51002129 is about 370.8481371470.

The spelling of 51002129 in words is "fifty-one million, two thousand, one hundred twenty-nine".