Adding to 541 its product of digits (20), we get a triangular number (561 = T33).
Adding to 541 its reverse (145), we get a palindrome (686).
541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is the 10-th star number.
It is a strong prime.
It is a cyclic number.
It is a Chen prime.
It is an alternating number because its digits alternate between odd and even.
541 is a lucky number.
It is a nialpdrome in base 9 and base 10.
It is a congruent number.
It is a good prime.
2541 is an apocalyptic number.
It is an amenable number.
541 is an equidigital number, since it uses as much as digits as its factorization.
541 is an odious number, because the sum of its binary digits is odd.
The square root of 541 is about 23.2594066992. The cubic root of 541 is about 8.1482764494.
The spelling of 541 in words is "five hundred forty-one", and thus it is an aban number.