51873856 has 56 divisors (see below), whose sum is σ = 107725464. Its totient is φ = 24760320.

The previous prime is 51873847. The next prime is 51873869. The reversal of 51873856 is 65837815.

It can be written as a sum of positive squares in 4 ways, for example, as 3097600 + 48776256 = 1760^2 + 6984^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138886 + ... + 139258.

It is an arithmetic number, because the mean of its divisors is an integer number (1923669).

Almost surely, 2^51873856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51873856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53862732).

51873856 is an abundant number, since it is smaller than the sum of its proper divisors (55851608).

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

51873856 is a wasteful number, since it uses less digits than its factorization.

51873856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479 (or 469 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 51873856 is about 7202.3507273667. The cubic root of 51873856 is about 372.9490547043.

The spelling of 51873856 in words is "fifty-one million, eight hundred seventy-three thousand, eight hundred fifty-six".