41551561 has 2 divisors, whose sum is σ = 41551562. Its totient is φ = 41551560.

The previous prime is 41551541. The next prime is 41551567. The reversal of 41551561 is 16515514.

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., 28090000 + 13461561 = 5300^2 + 3669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41551561 is a prime.

It is not a weakly prime, because it can be changed into another prime (41551567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20775780 + 20775781.

It is an arithmetic number, because the mean of its divisors is an integer number (20775781).

Almost surely, 2^41551561 is an apocalyptic number.

It is an amenable number.

41551561 is a deficient number, since it is larger than the sum of its proper divisors (1).

41551561 is an equidigital number, since it uses as much as digits as its factorization.

41551561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 28.

The square root of 41551561 is about 6446.0500308328. The cubic root of 41551561 is about 346.3611035064.

The spelling of 41551561 in words is "forty-one million, five hundred fifty-one thousand, five hundred sixty-one".