51442856 has 16 divisors (see below), whose sum is σ = 96566100. Its totient is φ = 25691904.

The previous prime is 51442843. The next prime is 51442871. The reversal of 51442856 is 65824415.

It can be written as a sum of positive squares in 2 ways, for example, as 51122500 + 320356 = 7150^2 + 566^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4886 + ... + 11258.

Almost surely, 2^51442856 is an apocalyptic number.

It is an amenable number.

51442856 is a deficient number, since it is larger than the sum of its proper divisors (45123244).

51442856 is a wasteful number, since it uses less digits than its factorization.

51442856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7388 (or 7384 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 51442856 is about 7172.3675310179. The cubic root of 51442856 is about 371.9132838302.

It can be divided in two parts, 5144 and 2856, that added together give a cube (8000 = 20³).

The spelling of 51442856 in words is "fifty-one million, four hundred forty-two thousand, eight hundred fifty-six".