51085869229 has 2 divisors, whose sum is σ = 51085869230. Its totient is φ = 51085869228.

The previous prime is 51085869223. The next prime is 51085869323. The reversal of 51085869229 is 92296858015.

51085869229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43160062500 + 7925806729 = 207750^2 + 89027^2 .

It is a cyclic number.

It is not a de Polignac number, because 51085869229 - 2³¹ = 48938385581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51085869229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51085869223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25542934614 + 25542934615.

It is an arithmetic number, because the mean of its divisors is an integer number (25542934615).

Almost surely, 2^51085869229 is an apocalyptic number.

It is an amenable number.

51085869229 is a deficient number, since it is larger than the sum of its proper divisors (1).

51085869229 is an equidigital number, since it uses as much as digits as its factorization.

51085869229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3110400, while the sum is 55.

The spelling of 51085869229 in words is "fifty-one billion, eighty-five million, eight hundred sixty-nine thousand, two hundred twenty-nine".