50161 has 4 divisors (see below), whose sum is σ = 50752. Its totient is φ = 49572.

The previous prime is 50159. The next prime is 50177. The reversal of 50161 is 16105.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16105 = 5 ⋅3221.

It is a cyclic number.

It is not a de Polignac number, because 50161 - 2¹ = 50159 is a prime.

It is a super-2 number, since 2×50161² = 5032251842, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

50161 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141 + ... + 346.

It is an arithmetic number, because the mean of its divisors is an integer number (12688).

2⁵⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

50161 is a deficient number, since it is larger than the sum of its proper divisors (591).

50161 is a wasteful number, since it uses less digits than its factorization.

50161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 50161 is about 223.9665153544. The cubic root of 50161 is about 36.8798145586.

Adding to 50161 its reverse (16105), we get a palindrome (66266).

The spelling of 50161 in words is "fifty thousand, one hundred sixty-one".