41513581 has 2 divisors, whose sum is σ = 41513582. Its totient is φ = 41513580.

The previous prime is 41513579. The next prime is 41513623. The reversal of 41513581 is 18531514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25593481 + 15920100 = 5059^2 + 3990^2 .

It is a cyclic number.

It is not a de Polignac number, because 41513581 - 2¹ = 41513579 is a prime.

It is a super-2 number, since 2×41513581² = 3446754814887122, which contains 22 as substring.

Together with 41513579, 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 (41513561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20756790 + 20756791.

It is an arithmetic number, because the mean of its divisors is an integer number (20756791).

Almost surely, 2^41513581 is an apocalyptic number.

It is an amenable number.

41513581 is a deficient number, since it is larger than the sum of its proper divisors (1).

41513581 is an equidigital number, since it uses as much as digits as its factorization.

41513581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 28.

The square root of 41513581 is about 6443.1033671671. The cubic root of 41513581 is about 346.2555414493.

The spelling of 41513581 in words is "forty-one million, five hundred thirteen thousand, five hundred eighty-one".