51612021163 has 2 divisors, whose sum is σ = 51612021164. Its totient is φ = 51612021162.

The previous prime is 51612021161. The next prime is 51612021169. The reversal of 51612021163 is 36112021615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51612021163 - 2¹ = 51612021161 is a prime.

Together with 51612021161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51612021161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25806010581 + 25806010582.

It is an arithmetic number, because the mean of its divisors is an integer number (25806010582).

Almost surely, 2^51612021163 is an apocalyptic number.

51612021163 is a deficient number, since it is larger than the sum of its proper divisors (1).

51612021163 is an equidigital number, since it uses as much as digits as its factorization.

51612021163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 51612021163 its reverse (36112021615), we get a palindrome (87724042778).

The spelling of 51612021163 in words is "fifty-one billion, six hundred twelve million, twenty-one thousand, one hundred sixty-three".