51861128 has 16 divisors (see below), whose sum is σ = 106079760. Its totient is φ = 23573200.

The previous prime is 51861119. The next prime is 51861157. The reversal of 51861128 is 82116815.

It is a junction number, because it is equal to n+sod(n) for n = 51861094 and 51861103.

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, 294578 + ... + 294753.

It is an arithmetic number, because the mean of its divisors is an integer number (6629985).

Almost surely, 2^51861128 is an apocalyptic number.

It is an amenable number.

51861128 is an abundant number, since it is smaller than the sum of its proper divisors (54218632).

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

51861128 is a wasteful number, since it uses less digits than its factorization.

51861128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589348 (or 589344 counting only the distinct ones).

The product of its digits is 3840, while the sum is 32.

The square root of 51861128 is about 7201.4670727568. The cubic root of 51861128 is about 372.9185493963.

The spelling of 51861128 in words is "fifty-one million, eight hundred sixty-one thousand, one hundred twenty-eight".