50183981 has 2 divisors, whose sum is σ = 50183982. Its totient is φ = 50183980.

The previous prime is 50183957. The next prime is 50183989. The reversal of 50183981 is 18938105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45630025 + 4553956 = 6755^2 + 2134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50183981 is a prime.

It is a super-2 number, since 2×50183981² = 5036863898016722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50183989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25091990 + 25091991.

It is an arithmetic number, because the mean of its divisors is an integer number (25091991).

Almost surely, 2^50183981 is an apocalyptic number.

It is an amenable number.

50183981 is a deficient number, since it is larger than the sum of its proper divisors (1).

50183981 is an equidigital number, since it uses as much as digits as its factorization.

50183981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 50183981 is about 7084.0652876720. The cubic root of 50183981 is about 368.8544579678.

The spelling of 50183981 in words is "fifty million, one hundred eighty-three thousand, nine hundred eighty-one".