50385981 has 16 divisors (see below), whose sum is σ = 68963840. Its totient is φ = 32704560.

The previous prime is 50385961. The next prime is 50385983. The reversal of 50385981 is 18958305.

It is not a de Polignac number, because 50385981 - 2⁵ = 50385949 is a prime.

It is a super-2 number, since 2×50385981² = 5077494162664722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50385983) 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 15 ways as a sum of consecutive naturals, for example, 79536 + ... + 80166.

It is an arithmetic number, because the mean of its divisors is an integer number (4310240).

Almost surely, 2^50385981 is an apocalyptic number.

It is an amenable number.

50385981 is a deficient number, since it is larger than the sum of its proper divisors (18577859).

50385981 is a wasteful number, since it uses less digits than its factorization.

50385981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 50385981 is about 7098.3083195928. The cubic root of 50385981 is about 369.3486983714.

The spelling of 50385981 in words is "fifty million, three hundred eighty-five thousand, nine hundred eighty-one".