51332644 has 24 divisors (see below), whose sum is σ = 98977536. Its totient is φ = 23100000.

The previous prime is 51332609. The next prime is 51332663. The reversal of 51332644 is 44623315.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1332 + ... + 10219.

It is an arithmetic number, because the mean of its divisors is an integer number (4124064).

Almost surely, 2^51332644 is an apocalyptic number.

It is an amenable number.

51332644 is a deficient number, since it is larger than the sum of its proper divisors (47644892).

51332644 is a wasteful number, since it uses less digits than its factorization.

51332644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11667 (or 11665 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 51332644 is about 7164.6803138730. The cubic root of 51332644 is about 371.6474962686.

Adding to 51332644 its reverse (44623315), we get a palindrome (95955959).

It can be divided in two parts, 5133 and 2644, that added together give a palindrome (7777).

The spelling of 51332644 in words is "fifty-one million, three hundred thirty-two thousand, six hundred forty-four".