51213958163 has 2 divisors, whose sum is σ = 51213958164. Its totient is φ = 51213958162.

The previous prime is 51213958127. The next prime is 51213958223. The reversal of 51213958163 is 36185931215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51213958163 - 2¹² = 51213954067 is a prime.

It is not a weakly prime, because it can be changed into another prime (51213958463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606979081 + 25606979082.

It is an arithmetic number, because the mean of its divisors is an integer number (25606979082).

Almost surely, 2^51213958163 is an apocalyptic number.

51213958163 is a deficient number, since it is larger than the sum of its proper divisors (1).

51213958163 is an equidigital number, since it uses as much as digits as its factorization.

51213958163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 44.

The spelling of 51213958163 in words is "fifty-one billion, two hundred thirteen million, nine hundred fifty-eight thousand, one hundred sixty-three".