51113431099 has 2 divisors, whose sum is σ = 51113431100. Its totient is φ = 51113431098.

The previous prime is 51113431073. The next prime is 51113431121. The reversal of 51113431099 is 99013431115.

51113431099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51113431099 - 2¹⁷ = 51113300027 is a prime.

It is a super-2 number, since 2×51113431099² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51113131099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25556715549 + 25556715550.

It is an arithmetic number, because the mean of its divisors is an integer number (25556715550).

Almost surely, 2^51113431099 is an apocalyptic number.

51113431099 is a deficient number, since it is larger than the sum of its proper divisors (1).

51113431099 is an equidigital number, since it uses as much as digits as its factorization.

51113431099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The spelling of 51113431099 in words is "fifty-one billion, one hundred thirteen million, four hundred thirty-one thousand, ninety-nine".