51113923087 has 2 divisors, whose sum is σ = 51113923088. Its totient is φ = 51113923086.

The previous prime is 51113923051. The next prime is 51113923151. The reversal of 51113923087 is 78032931115.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51113923087 is a prime.

It is a super-2 number, since 2×51113923087² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51113927087) 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, 25556961543 + 25556961544.

It is an arithmetic number, because the mean of its divisors is an integer number (25556961544).

Almost surely, 2^51113923087 is an apocalyptic number.

51113923087 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113923087 is an equidigital number, since it uses as much as digits as its factorization.

51113923087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 51113923087 in words is "fifty-one billion, one hundred thirteen million, nine hundred twenty-three thousand, eighty-seven".