51787936 has 12 divisors (see below), whose sum is σ = 101957562. Its totient is φ = 25893952.

The previous prime is 51787907. The next prime is 51787979. The reversal of 51787936 is 63978715.

It can be written as a sum of positive squares in only one way, i.e., 47610000 + 4177936 = 6900^2 + 2044^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809155 + ... + 809218.

Almost surely, 2^51787936 is an apocalyptic number.

It is an amenable number.

51787936 is a deficient number, since it is larger than the sum of its proper divisors (50169626).

51787936 is a wasteful number, since it uses less digits than its factorization.

51787936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618383 (or 1618375 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 51787936 is about 7196.3835361937. The cubic root of 51787936 is about 372.7430325498.

The spelling of 51787936 in words is "fifty-one million, seven hundred eighty-seven thousand, nine hundred thirty-six".