51843906 has 24 divisors (see below), whose sum is σ = 113444604. Its totient is φ = 17109600.

The previous prime is 51843901. The next prime is 51843929. The reversal of 51843906 is 60934815.

It can be written as a sum of positive squares in 2 ways, for example, as 39879225 + 11964681 = 6315^2 + 3459^2 .

It is not an unprimeable number, because it can be changed into a prime (51843901) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 12441 + ... + 16076.

Almost surely, 2^51843906 is an apocalyptic number.

51843906 is an abundant number, since it is smaller than the sum of its proper divisors (61600698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51843906 is a wasteful number, since it uses less digits than its factorization.

51843906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28626 (or 28623 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51843906 is about 7200.2712448907. The cubic root of 51843906 is about 372.8772653328.

Subtracting 51843906 from its reverse (60934815), we obtain a palindrome (9090909).

The spelling of 51843906 in words is "fifty-one million, eight hundred forty-three thousand, nine hundred six".