51782441 has 4 divisors (see below), whose sum is σ = 51810132. Its totient is φ = 51754752.

The previous prime is 51782413. The next prime is 51782443. The reversal of 51782441 is 14428715.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43824400 + 7958041 = 6620^2 + 2821^2 .

It is a cyclic number.

It is not a de Polignac number, because 51782441 - 2⁶ = 51782377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51782398 and 51782407.

It is not an unprimeable number, because it can be changed into a prime (51782443) 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 3 ways as a sum of consecutive naturals, for example, 10820 + ... + 14853.

It is an arithmetic number, because the mean of its divisors is an integer number (12952533).

Almost surely, 2^51782441 is an apocalyptic number.

It is an amenable number.

51782441 is a deficient number, since it is larger than the sum of its proper divisors (27691).

51782441 is a wasteful number, since it uses less digits than its factorization.

51782441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27690.

The product of its digits is 8960, while the sum is 32.

The square root of 51782441 is about 7196.0017370759. The cubic root of 51782441 is about 372.7298486852.

The spelling of 51782441 in words is "fifty-one million, seven hundred eighty-two thousand, four hundred forty-one".