51861130 has 16 divisors (see below), whose sum is σ = 94533120. Its totient is φ = 20481552.

The previous prime is 51861119. The next prime is 51861157. The reversal of 51861130 is 3116815.

51861130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51861095 and 51861104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32034 + ... + 33613.

It is an arithmetic number, because the mean of its divisors is an integer number (5908320).

Almost surely, 2^51861130 is an apocalyptic number.

51861130 is a deficient number, since it is larger than the sum of its proper divisors (42671990).

51861130 is a wasteful number, since it uses less digits than its factorization.

51861130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65733.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 51861130 is about 7201.4672116174. The cubic root of 51861130 is about 372.9185541901.

Adding to 51861130 its reverse (3116815), we get a palindrome (54977945).

The spelling of 51861130 in words is "fifty-one million, eight hundred sixty-one thousand, one hundred thirty".