51205235299 has 2 divisors, whose sum is σ = 51205235300. Its totient is φ = 51205235298.

The previous prime is 51205235261. The next prime is 51205235357. The reversal of 51205235299 is 99253250215.

51205235299 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 is a cyclic number.

It is not a de Polignac number, because 51205235299 - 2¹⁹ = 51204711011 is a prime.

It is a super-2 number, since 2×51205235299² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51205235209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25602617649 + 25602617650.

It is an arithmetic number, because the mean of its divisors is an integer number (25602617650).

Almost surely, 2^51205235299 is an apocalyptic number.

51205235299 is a deficient number, since it is larger than the sum of its proper divisors (1).

51205235299 is an equidigital number, since it uses as much as digits as its factorization.

51205235299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 43.

The spelling of 51205235299 in words is "fifty-one billion, two hundred five million, two hundred thirty-five thousand, two hundred ninety-nine".