51108730 has 16 divisors (see below), whose sum is σ = 95168520. Its totient is φ = 19738432.

The previous prime is 51108719. The next prime is 51108731. The reversal of 51108730 is 3780115.

It can be written as a sum of positive squares in 4 ways, for example, as 50367409 + 741321 = 7097^2 + 861^2 .

It is a super-2 number, since 2×51108730² = 5224204564425800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51108695 and 51108704.

It is not an unprimeable number, because it can be changed into a prime (51108731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87829 + ... + 88408.

Almost surely, 2^51108730 is an apocalyptic number.

51108730 is a deficient number, since it is larger than the sum of its proper divisors (44059790).

51108730 is a wasteful number, since it uses less digits than its factorization.

51108730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176273.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 51108730 is about 7149.0369980858. The cubic root of 51108730 is about 371.1063307565.

Adding to 51108730 its reverse (3780115), we get a palindrome (54888845).

The spelling of 51108730 in words is "fifty-one million, one hundred eight thousand, seven hundred thirty".