50781985 has 8 divisors (see below), whose sum is σ = 62424936. Its totient is φ = 39634560.

The previous prime is 50781977. The next prime is 50781989. The reversal of 50781985 is 58918705.

50781985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4528384 + 46253601 = 2128^2 + 6801^2 .

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

It is not a de Polignac number, because 50781985 - 2³ = 50781977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50781989) 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, 123654 + ... + 124063.

It is an arithmetic number, because the mean of its divisors is an integer number (7803117).

Almost surely, 2^50781985 is an apocalyptic number.

It is an amenable number.

50781985 is a deficient number, since it is larger than the sum of its proper divisors (11642951).

50781985 is a wasteful number, since it uses less digits than its factorization.

50781985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247763.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 50781985 is about 7126.1479776945. The cubic root of 50781985 is about 370.3137951553.

The spelling of 50781985 in words is "fifty million, seven hundred eighty-one thousand, nine hundred eighty-five".