51854788331 has 2 divisors, whose sum is σ = 51854788332. Its totient is φ = 51854788330.

The previous prime is 51854788313. The next prime is 51854788387. The reversal of 51854788331 is 13388745815.

Together with previous prime (51854788313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51854788331 - 2¹⁸ = 51854526187 is a prime.

It is a super-2 number, since 2×51854788331² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51854781331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25927394165 + 25927394166.

It is an arithmetic number, because the mean of its divisors is an integer number (25927394166).

Almost surely, 2^51854788331 is an apocalyptic number.

51854788331 is a deficient number, since it is larger than the sum of its proper divisors (1).

51854788331 is an equidigital number, since it uses as much as digits as its factorization.

51854788331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3225600, while the sum is 53.

The spelling of 51854788331 in words is "fifty-one billion, eight hundred fifty-four million, seven hundred eighty-eight thousand, three hundred thirty-one".