51123130205 has 32 divisors (see below), whose sum is σ = 70600529664. Its totient is φ = 34812112896.

The previous prime is 51123130183. The next prime is 51123130229. The reversal of 51123130205 is 50203132115.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51123130205 - 2²⁸ = 50854694749 is a prime.

It is a super-2 number, since 2×51123130205² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3958739 + ... + 3971631.

It is an arithmetic number, because the mean of its divisors is an integer number (2206266552).

Almost surely, 2^51123130205 is an apocalyptic number.

It is an amenable number.

51123130205 is a deficient number, since it is larger than the sum of its proper divisors (19477399459).

51123130205 is a wasteful number, since it uses less digits than its factorization.

51123130205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13685.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 51123130205 in words is "fifty-one billion, one hundred twenty-three million, one hundred thirty thousand, two hundred five".