51643338 has 8 divisors (see below), whose sum is σ = 103286688. Its totient is φ = 17214444.

The previous prime is 51643321. The next prime is 51643343. The reversal of 51643338 is 83334615.

It is a sphenic number, since it is the product of 3 distinct primes.

51643338 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 51643299 and 51643308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4303606 + ... + 4303617.

It is an arithmetic number, because the mean of its divisors is an integer number (12910836).

Almost surely, 2^51643338 is an apocalyptic number.

51643338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51643338 is a wasteful number, since it uses less digits than its factorization.

51643338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8607228.

The product of its digits is 25920, while the sum is 33.

The square root of 51643338 is about 7186.3299395449. The cubic root of 51643338 is about 372.3957950641.

The spelling of 51643338 in words is "fifty-one million, six hundred forty-three thousand, three hundred thirty-eight".