51158816 has 24 divisors (see below), whose sum is σ = 103178124. Its totient is φ = 24954880.

The previous prime is 51158803. The next prime is 51158843. The reversal of 51158816 is 61885115.

It can be written as a sum of positive squares in 2 ways, for example, as 43296400 + 7862416 = 6580^2 + 2804^2 .

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, 18185 + ... + 20808.

Almost surely, 2^51158816 is an apocalyptic number.

It is an amenable number.

51158816 is an abundant number, since it is smaller than the sum of its proper divisors (52019308).

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

51158816 is a wasteful number, since it uses less digits than its factorization.

51158816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39044 (or 39036 counting only the distinct ones).

The product of its digits is 9600, while the sum is 35.

The square root of 51158816 is about 7152.5391295679. The cubic root of 51158816 is about 371.2275179015.

It can be divided in two parts, 5115 and 8816, that added together give a palindrome (13931).

The spelling of 51158816 in words is "fifty-one million, one hundred fifty-eight thousand, eight hundred sixteen".