40581113 has 2 divisors, whose sum is σ = 40581114. Its totient is φ = 40581112.

The previous prime is 40581109. The next prime is 40581133. The reversal of 40581113 is 31118504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37982569 + 2598544 = 6163^2 + 1612^2 .

It is a cyclic number.

It is not a de Polignac number, because 40581113 - 2² = 40581109 is a prime.

It is not a weakly prime, because it can be changed into another prime (40581133) 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, 20290556 + 20290557.

It is an arithmetic number, because the mean of its divisors is an integer number (20290557).

Almost surely, 2^40581113 is an apocalyptic number.

It is an amenable number.

40581113 is a deficient number, since it is larger than the sum of its proper divisors (1).

40581113 is an equidigital number, since it uses as much as digits as its factorization.

40581113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 40581113 is about 6370.3306821546. The cubic root of 40581113 is about 343.6433821193.

Adding to 40581113 its reverse (31118504), we get a palindrome (71699617).

It can be divided in two parts, 405 and 81113, that added together give a palindrome (81518).

The spelling of 40581113 in words is "forty million, five hundred eighty-one thousand, one hundred thirteen".