51747644 has 12 divisors (see below), whose sum is σ = 97524504. Its totient is φ = 23883504.

The previous prime is 51747637. The next prime is 51747667. The reversal of 51747644 is 44674715.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51747598 and 51747607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497522 + ... + 497625.

It is an arithmetic number, because the mean of its divisors is an integer number (8127042).

Almost surely, 2^51747644 is an apocalyptic number.

It is an amenable number.

51747644 is a deficient number, since it is larger than the sum of its proper divisors (45776860).

51747644 is a wasteful number, since it uses less digits than its factorization.

51747644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995164 (or 995162 counting only the distinct ones).

The product of its digits is 94080, while the sum is 38.

The square root of 51747644 is about 7193.5835297854. The cubic root of 51747644 is about 372.6463404112.

The spelling of 51747644 in words is "fifty-one million, seven hundred forty-seven thousand, six hundred forty-four".