41516561 has 2 divisors, whose sum is σ = 41516562. Its totient is φ = 41516560.

The previous prime is 41516549. The next prime is 41516591. The reversal of 41516561 is 16561514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21446161 + 20070400 = 4631^2 + 4480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41516561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41516521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20758280 + 20758281.

It is an arithmetic number, because the mean of its divisors is an integer number (20758281).

Almost surely, 2^41516561 is an apocalyptic number.

It is an amenable number.

41516561 is a deficient number, since it is larger than the sum of its proper divisors (1).

41516561 is an equidigital number, since it uses as much as digits as its factorization.

41516561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 41516561 is about 6443.3346180375. The cubic root of 41516561 is about 346.2638264233.

The spelling of 41516561 in words is "forty-one million, five hundred sixteen thousand, five hundred sixty-one".