41561813 has 2 divisors, whose sum is σ = 41561814. Its totient is φ = 41561812.

The previous prime is 41561777. The next prime is 41561837. The reversal of 41561813 is 31816514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21696964 + 19864849 = 4658^2 + 4457^2 .

It is a cyclic number.

It is not a de Polignac number, because 41561813 - 2⁶ = 41561749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41561213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20780906 + 20780907.

It is an arithmetic number, because the mean of its divisors is an integer number (20780907).

Almost surely, 2^41561813 is an apocalyptic number.

It is an amenable number.

41561813 is a deficient number, since it is larger than the sum of its proper divisors (1).

41561813 is an equidigital number, since it uses as much as digits as its factorization.

41561813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 41561813 is about 6446.8451974590. The cubic root of 41561813 is about 346.3895870094.

The spelling of 41561813 in words is "forty-one million, five hundred sixty-one thousand, eight hundred thirteen".