51861392 has 40 divisors (see below), whose sum is σ = 112305312. Its totient is φ = 22995200.

The previous prime is 51861391. The next prime is 51861409. The reversal of 51861392 is 29316815.

51861392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51861391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3623 + ... + 10809.

Almost surely, 2^51861392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51861392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56152656).

51861392 is an abundant number, since it is smaller than the sum of its proper divisors (60443920).

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

51861392 is a wasteful number, since it uses less digits than its factorization.

51861392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247 (or 7241 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 51861392 is about 7201.4854023319. The cubic root of 51861392 is about 372.9191821781.

The spelling of 51861392 in words is "fifty-one million, eight hundred sixty-one thousand, three hundred ninety-two".