51538180 has 12 divisors (see below), whose sum is σ = 108230220. Its totient is φ = 20615264.

The previous prime is 51538171. The next prime is 51538297. The reversal of 51538180 is 8183515.

It can be written as a sum of positive squares in 2 ways, for example, as 15634116 + 35904064 = 3954^2 + 5992^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288435 + ... + 1288474.

It is an arithmetic number, because the mean of its divisors is an integer number (9019185).

Almost surely, 2^51538180 is an apocalyptic number.

It is an amenable number.

51538180 is an abundant number, since it is smaller than the sum of its proper divisors (56692040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51538180 is a wasteful number, since it uses less digits than its factorization.

51538180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576918 (or 2576916 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 51538180 is about 7179.0096810075. The cubic root of 51538180 is about 372.1428614584.

The spelling of 51538180 in words is "fifty-one million, five hundred thirty-eight thousand, one hundred eighty".