40528181 has 4 divisors (see below), whose sum is σ = 40541292. Its totient is φ = 40515072.

The previous prime is 40528171. The next prime is 40528183. The reversal of 40528181 is 18182504.

40528181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26615281 + 13912900 = 5159^2 + 3730^2 .

It is a cyclic number.

It is not a de Polignac number, because 40528181 - 2²² = 36333877 is a prime.

It is a super-2 number, since 2×40528181² = 3285066910337522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40528183) 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 in 3 ways as a sum of consecutive naturals, for example, 935 + ... + 9051.

It is an arithmetic number, because the mean of its divisors is an integer number (10135323).

Almost surely, 2^40528181 is an apocalyptic number.

It is an amenable number.

40528181 is a deficient number, since it is larger than the sum of its proper divisors (13111).

40528181 is an equidigital number, since it uses as much as digits as its factorization.

40528181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13110.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 40528181 is about 6366.1747541204. The cubic root of 40528181 is about 343.4939066245.

The spelling of 40528181 in words is "forty million, five hundred twenty-eight thousand, one hundred eighty-one".