51743816 has 8 divisors (see below), whose sum is σ = 97019670. Its totient is φ = 25871904.

The previous prime is 51743807. The next prime is 51743819. The reversal of 51743816 is 61834715.

It can be written as a sum of positive squares in only one way, i.e., 48246916 + 3496900 = 6946^2 + 1870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (51743819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3233981 + ... + 3233996.

Almost surely, 2^51743816 is an apocalyptic number.

It is an amenable number.

51743816 is a deficient number, since it is larger than the sum of its proper divisors (45275854).

51743816 is a wasteful number, since it uses less digits than its factorization.

51743816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6467983 (or 6467979 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 51743816 is about 7193.3174544156. The cubic root of 51743816 is about 372.6371514236.

The spelling of 51743816 in words is "fifty-one million, seven hundred forty-three thousand, eight hundred sixteen".