41381581 has 2 divisors, whose sum is σ = 41381582. Its totient is φ = 41381580.

The previous prime is 41381537. The next prime is 41381633. The reversal of 41381581 is 18518314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40525956 + 855625 = 6366^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 41381581 - 2²¹ = 39284429 is a prime.

It is a super-2 number, since 2×41381581² = 3424870492119122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41381381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20690790 + 20690791.

It is an arithmetic number, because the mean of its divisors is an integer number (20690791).

Almost surely, 2^41381581 is an apocalyptic number.

It is an amenable number.

41381581 is a deficient number, since it is larger than the sum of its proper divisors (1).

41381581 is an equidigital number, since it uses as much as digits as its factorization.

41381581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 31.

The square root of 41381581 is about 6432.8517004514. The cubic root of 41381581 is about 345.8881575767. Note that the first 3 decimals are identical.

Adding to 41381581 its reverse (18518314), we get a palindrome (59899895).

The spelling of 41381581 in words is "forty-one million, three hundred eighty-one thousand, five hundred eighty-one".