51118113 has 12 divisors (see below), whose sum is σ = 71820560. Its totient is φ = 32251032.

The previous prime is 51118091. The next prime is 51118139. The reversal of 51118113 is 31181115.

It is a happy number.

It is not a de Polignac number, because 51118113 - 2⁶ = 51118049 is a prime.

It is a super-2 number, since 2×51118113² = 5226122953361538, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51118113.

It is not an unprimeable number, because it can be changed into a prime (51118153) 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, 53506 + ... + 54452.

Almost surely, 2^51118113 is an apocalyptic number.

It is an amenable number.

51118113 is a deficient number, since it is larger than the sum of its proper divisors (20702447).

51118113 is an frugal number, since it uses more digits than its factorization.

51118113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 969 counting only the distinct ones).

The product of its digits is 120, while the sum is 21.

The square root of 51118113 is about 7149.6932102014. The cubic root of 51118113 is about 371.1290397120.

Adding to 51118113 its reverse (31181115), we get a palindrome (82299228).

The spelling of 51118113 in words is "fifty-one million, one hundred eighteen thousand, one hundred thirteen".