51043881 has 16 divisors (see below), whose sum is σ = 79591424. Its totient is φ = 28489104.

The previous prime is 51043879. The next prime is 51043907. The reversal of 51043881 is 18834015.

51043881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51043881 - 2¹ = 51043879 is a prime.

It is a super-2 number, since 2×51043881² = 5210955575084322, which contains 22 as substring.

It is the 7145-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51043801) by changing a digit.

It is a nontrivial repunit in base 7144.

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 15 ways as a sum of consecutive naturals, for example, 27361 + ... + 29166.

It is an arithmetic number, because the mean of its divisors is an integer number (4974464).

Almost surely, 2^51043881 is an apocalyptic number.

It is an amenable number.

51043881 is a deficient number, since it is larger than the sum of its proper divisors (28547543).

51043881 is a wasteful number, since it uses less digits than its factorization.

51043881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56580.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 51043881 is about 7144.5000524879. The cubic root of 51043881 is about 370.9493056570.

Adding to 51043881 its reverse (18834015), we get a palindrome (69877896).

The spelling of 51043881 in words is "fifty-one million, forty-three thousand, eight hundred eighty-one".