51839812 has 24 divisors (see below), whose sum is σ = 96185600. Its totient is φ = 24403680.

The previous prime is 51839803. The next prime is 51839839. The reversal of 51839812 is 21893815.

It is a super-2 number, since 2×51839812² = 5374732216390688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 1062 + ... + 10237.

Almost surely, 2^51839812 is an apocalyptic number.

It is an amenable number.

51839812 is a deficient number, since it is larger than the sum of its proper divisors (44345788).

51839812 is a wasteful number, since it uses less digits than its factorization.

51839812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11371 (or 11369 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 51839812 is about 7199.9869444326. The cubic root of 51839812 is about 372.8674499734.

The spelling of 51839812 in words is "fifty-one million, eight hundred thirty-nine thousand, eight hundred twelve".