51784868 has 18 divisors (see below), whose sum is σ = 94738854. Its totient is φ = 24765664.

The previous prime is 51784853. The next prime is 51784883. The reversal of 51784868 is 86848715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51784853) and next prime (51784883).

It can be written as a sum of positive squares in only one way, i.e., 48888064 + 2896804 = 6992^2 + 1702^2 .

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 5 ways as a sum of consecutive naturals, for example, 10121 + ... + 14352.

Almost surely, 2^51784868 is an apocalyptic number.

It is an amenable number.

51784868 is a deficient number, since it is larger than the sum of its proper divisors (42953986).

51784868 is a wasteful number, since it uses less digits than its factorization.

51784868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24523 (or 24498 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 51784868 is about 7196.1703704123. The cubic root of 51784868 is about 372.7356717737.

The spelling of 51784868 in words is "fifty-one million, seven hundred eighty-four thousand, eight hundred sixty-eight".