51869824 has 32 divisors (see below), whose sum is σ = 103746240. Its totient is φ = 25831680.

The previous prime is 51869821. The next prime is 51869833. The reversal of 51869824 is 42896815.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (51869821) by changing a digit.

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, 39157 + ... + 40459.

It is an arithmetic number, because the mean of its divisors is an integer number (3242070).

Almost surely, 2^51869824 is an apocalyptic number.

It is an amenable number.

51869824 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

51869824 is a wasteful number, since it uses less digits than its factorization.

51869824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628 (or 1616 counting only the distinct ones).

The product of its digits is 138240, while the sum is 43.

The square root of 51869824 is about 7202.0708133147. The cubic root of 51869824 is about 372.9393917150.

The spelling of 51869824 in words is "fifty-one million, eight hundred sixty-nine thousand, eight hundred twenty-four".