51081824 has 24 divisors (see below), whose sum is σ = 102468240. Its totient is φ = 25058176.

The previous prime is 51081803. The next prime is 51081829. The reversal of 51081824 is 42818015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51081829) 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, 13364 + ... + 16755.

It is an arithmetic number, because the mean of its divisors is an integer number (4269510).

Almost surely, 2^51081824 is an apocalyptic number.

It is an amenable number.

51081824 is an abundant number, since it is smaller than the sum of its proper divisors (51386416).

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

51081824 is a wasteful number, since it uses less digits than its factorization.

51081824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30182 (or 30174 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 51081824 is about 7147.1549584433. The cubic root of 51081824 is about 371.0411968114.

Adding to 51081824 its reverse (42818015), we get a palindrome (93899839).

The spelling of 51081824 in words is "fifty-one million, eighty-one thousand, eight hundred twenty-four".