51108129 has 12 divisors (see below), whose sum is σ = 75394176. Its totient is φ = 33346872.

The previous prime is 51108107. The next prime is 51108131. The reversal of 51108129 is 92180115.

It is not a de Polignac number, because 51108129 - 2⁵ = 51108097 is a prime.

It is a super-2 number, since 2×51108129² = 5224081699761282, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51108199) 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, 59989 + ... + 60834.

It is an arithmetic number, because the mean of its divisors is an integer number (6282848).

Almost surely, 2^51108129 is an apocalyptic number.

It is an amenable number.

51108129 is a deficient number, since it is larger than the sum of its proper divisors (24286047).

51108129 is a wasteful number, since it uses less digits than its factorization.

51108129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120876 (or 120873 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 51108129 is about 7148.9949643289. The cubic root of 51108129 is about 371.1048761076.

The spelling of 51108129 in words is "fifty-one million, one hundred eight thousand, one hundred twenty-nine".