40132181 has 2 divisors, whose sum is σ = 40132182. Its totient is φ = 40132180.

The previous prime is 40132159. The next prime is 40132207. The reversal of 40132181 is 18123104.

40132181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35509681 + 4622500 = 5959^2 + 2150^2 .

It is a cyclic number.

It is not a de Polignac number, because 40132181 - 2⁶ = 40132117 is a prime.

It is a super-2 number, since 2×40132181² = 3221183903633522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40132151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20066090 + 20066091.

It is an arithmetic number, because the mean of its divisors is an integer number (20066091).

Almost surely, 2^40132181 is an apocalyptic number.

It is an amenable number.

40132181 is a deficient number, since it is larger than the sum of its proper divisors (1).

40132181 is an equidigital number, since it uses as much as digits as its factorization.

40132181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 40132181 is about 6334.9965272287. The cubic root of 40132181 is about 342.3714856967.

Adding to 40132181 its reverse (18123104), we get a palindrome (58255285).

The spelling of 40132181 in words is "forty million, one hundred thirty-two thousand, one hundred eighty-one".