50867981 has 4 divisors (see below), whose sum is σ = 50905152. Its totient is φ = 50830812.

The previous prime is 50867953. The next prime is 50867983. The reversal of 50867981 is 18976805.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50867981 - 2⁶ = 50867917 is a prime.

It is a super-2 number, since 2×50867981² = 5175102982032722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50867983) 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, 16451 + ... + 19296.

It is an arithmetic number, because the mean of its divisors is an integer number (12726288).

Almost surely, 2^50867981 is an apocalyptic number.

It is an amenable number.

50867981 is a deficient number, since it is larger than the sum of its proper divisors (37171).

50867981 is a wasteful number, since it uses less digits than its factorization.

50867981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37170.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 50867981 is about 7132.1792602261. The cubic root of 50867981 is about 370.5227114073.

The spelling of 50867981 in words is "fifty million, eight hundred sixty-seven thousand, nine hundred eighty-one".