41543561 has 2 divisors, whose sum is σ = 41543562. Its totient is φ = 41543560.

The previous prime is 41543533. The next prime is 41543569. The reversal of 41543561 is 16534514.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38502025 + 3041536 = 6205^2 + 1744^2 .

It is a cyclic number.

It is not a de Polignac number, because 41543561 - 2¹⁰ = 41542537 is a prime.

It is not a weakly prime, because it can be changed into another prime (41543569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20771780 + 20771781.

It is an arithmetic number, because the mean of its divisors is an integer number (20771781).

Almost surely, 2^41543561 is an apocalyptic number.

It is an amenable number.

41543561 is a deficient number, since it is larger than the sum of its proper divisors (1).

41543561 is an equidigital number, since it uses as much as digits as its factorization.

41543561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 41543561 is about 6445.4294659084. The cubic root of 41543561 is about 346.3388735620.

The spelling of 41543561 in words is "forty-one million, five hundred forty-three thousand, five hundred sixty-one".