541406221 has 2 divisors, whose sum is σ = 541406222. Its totient is φ = 541406220.

The previous prime is 541406219. The next prime is 541406233. The reversal of 541406221 is 122604145.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362140900 + 179265321 = 19030^2 + 13389^2 .

It is a cyclic number.

It is not a de Polignac number, because 541406221 - 2¹ = 541406219 is a prime.

It is a super-2 number, since 2×541406221² = 586241392275001682, which contains 22 as substring.

Together with 541406219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541406521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270703110 + 270703111.

It is an arithmetic number, because the mean of its divisors is an integer number (270703111).

Almost surely, 2^541406221 is an apocalyptic number.

It is an amenable number.

541406221 is a deficient number, since it is larger than the sum of its proper divisors (1).

541406221 is an equidigital number, since it uses as much as digits as its factorization.

541406221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 541406221 is about 23268.1374630631. The cubic root of 541406221 is about 815.0315372894.

The spelling of 541406221 in words is "five hundred forty-one million, four hundred six thousand, two hundred twenty-one".