50306381 has 6 divisors (see below), whose sum is σ = 51276330. Its totient is φ = 49354448.

The previous prime is 50306369. The next prime is 50306401. The reversal of 50306381 is 18360305.

It can be written as a sum of positive squares in 3 ways, for example, as 15602500 + 34703881 = 3950^2 + 5891^2 .

It is not a de Polignac number, because 50306381 - 2¹⁰ = 50305357 is a prime.

It is a super-3 number, since 3×50306381³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50306381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50306341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6146 + ... + 11763.

It is an arithmetic number, because the mean of its divisors is an integer number (8546055).

Almost surely, 2^50306381 is an apocalyptic number.

It is an amenable number.

50306381 is a deficient number, since it is larger than the sum of its proper divisors (969949).

50306381 is an equidigital number, since it uses as much as digits as its factorization.

50306381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18015 (or 17962 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 50306381 is about 7092.6991336162. The cubic root of 50306381 is about 369.1540962779.

Adding to 50306381 its reverse (18360305), we get a palindrome (68666686).

It can be divided in two parts, 5030 and 6381, that added together give a palindrome (11411).

The spelling of 50306381 in words is "fifty million, three hundred six thousand, three hundred eighty-one".