51081884 has 12 divisors (see below), whose sum is σ = 102163824. Its totient is φ = 21892224.

The previous prime is 51081851. The next prime is 51081911. The reversal of 51081884 is 48818015.

51081884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

51081884 is an admirable number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912149 + ... + 912204.

It is an arithmetic number, because the mean of its divisors is an integer number (8513652).

Almost surely, 2^51081884 is an apocalyptic number.

It is an amenable number.

51081884 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51081884 is a wasteful number, since it uses less digits than its factorization.

51081884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824364 (or 1824362 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 35.

The square root of 51081884 is about 7147.1591559164. The cubic root of 51081884 is about 371.0413420847.

Adding to 51081884 its reverse (48818015), we get a palindrome (99899899).

The spelling of 51081884 in words is "fifty-one million, eighty-one thousand, eight hundred eighty-four".