51009944 has 16 divisors (see below), whose sum is σ = 95839200. Its totient is φ = 25452832.

The previous prime is 51009941. The next prime is 51009947. The reversal of 51009944 is 44990015.

It is an interprime number because it is at equal distance from previous prime (51009941) and next prime (51009947).

It is a self number, because there is not a number n which added to its sum of digits gives 51009944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51009941) 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, 2192 + ... + 10335.

It is an arithmetic number, because the mean of its divisors is an integer number (5989950).

Almost surely, 2^51009944 is an apocalyptic number.

It is an amenable number.

51009944 is a deficient number, since it is larger than the sum of its proper divisors (44829256).

51009944 is a wasteful number, since it uses less digits than its factorization.

51009944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13042 (or 13038 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 51009944 is about 7142.1246138667. The cubic root of 51009944 is about 370.8670777300.

Adding to 51009944 its reverse (44990015), we get a palindrome (95999959).

The spelling of 51009944 in words is "fifty-one million, nine thousand, nine hundred forty-four".