40652581 has 2 divisors, whose sum is σ = 40652582. Its totient is φ = 40652580.

The previous prime is 40652561. The next prime is 40652621. The reversal of 40652581 is 18525604.

40652581 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., 26522500 + 14130081 = 5150^2 + 3759^2 .

It is a cyclic number.

It is not a de Polignac number, because 40652581 - 2⁷ = 40652453 is a prime.

It is a super-2 number, since 2×40652581² = 3305264683923122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40652561) 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, 20326290 + 20326291.

It is an arithmetic number, because the mean of its divisors is an integer number (20326291).

Almost surely, 2^40652581 is an apocalyptic number.

It is an amenable number.

40652581 is a deficient number, since it is larger than the sum of its proper divisors (1).

40652581 is an equidigital number, since it uses as much as digits as its factorization.

40652581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 40652581 is about 6375.9376565334. The cubic root of 40652581 is about 343.8449956297.

The spelling of 40652581 in words is "forty million, six hundred fifty-two thousand, five hundred eighty-one".