51318938403 has 12 divisors (see below), whose sum is σ = 74194211520. Its totient is φ = 34181768976.

The previous prime is 51318938399. The next prime is 51318938413. The reversal of 51318938403 is 30483981315.

51318938403 is a `hidden beast` number, since 5 + 131 + 89 + 38 + 403 = 666.

It is not a de Polignac number, because 51318938403 - 2² = 51318938399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51318938413) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2560851 + ... + 2580812.

It is an arithmetic number, because the mean of its divisors is an integer number (6182850960).

Almost surely, 2^51318938403 is an apocalyptic number.

51318938403 is a deficient number, since it is larger than the sum of its proper divisors (22875273117).

51318938403 is a wasteful number, since it uses less digits than its factorization.

51318938403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5142778 (or 5142775 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 51318938403 in words is "fifty-one billion, three hundred eighteen million, nine hundred thirty-eight thousand, four hundred three".