51284812 has 24 divisors (see below), whose sum is σ = 92753136. Its totient is φ = 24792768.

The previous prime is 51284803. The next prime is 51284839. The reversal of 51284812 is 21848215.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24603 + ... + 26605.

It is an arithmetic number, because the mean of its divisors is an integer number (3864714).

Almost surely, 2^51284812 is an apocalyptic number.

It is an amenable number.

51284812 is a deficient number, since it is larger than the sum of its proper divisors (41468324).

51284812 is a wasteful number, since it uses less digits than its factorization.

51284812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2215 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 51284812 is about 7161.3414944408. The cubic root of 51284812 is about 371.5320260988.

The spelling of 51284812 in words is "fifty-one million, two hundred eighty-four thousand, eight hundred twelve".