50990381 has 16 divisors (see below), whose sum is σ = 58652160. Its totient is φ = 43968960.

The previous prime is 50990369. The next prime is 50990393. The reversal of 50990381 is 18309905.

It is an interprime number because it is at equal distance from previous prime (50990369) and next prime (50990393).

It is a cyclic number.

It is not a de Polignac number, because 50990381 - 2¹⁴ = 50973997 is a prime.

It is a super-2 number, since 2×50990381² = 5200037909050322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50990311) 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, 9506 + ... + 13868.

It is an arithmetic number, because the mean of its divisors is an integer number (3665760).

Almost surely, 2^50990381 is an apocalyptic number.

It is an amenable number.

50990381 is a deficient number, since it is larger than the sum of its proper divisors (7661779).

50990381 is a wasteful number, since it uses less digits than its factorization.

50990381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 50990381 is about 7140.7549320783. The cubic root of 50990381 is about 370.8196608294.

The spelling of 50990381 in words is "fifty million, nine hundred ninety thousand, three hundred eighty-one".