40220065 has 4 divisors (see below), whose sum is σ = 48264084. Its totient is φ = 32176048.

The previous prime is 40220053. The next prime is 40220069. The reversal of 40220065 is 56002204.

40220065 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.

It can be written as a sum of positive squares in 2 ways, for example, as 27709696 + 12510369 = 5264^2 + 3537^2 .

It is a cyclic number.

It is not a de Polignac number, because 40220065 - 2⁷ = 40219937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40220069) 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, 4022002 + ... + 4022011.

It is an arithmetic number, because the mean of its divisors is an integer number (12066021).

Almost surely, 2^40220065 is an apocalyptic number.

It is an amenable number.

40220065 is a deficient number, since it is larger than the sum of its proper divisors (8044019).

40220065 is an equidigital number, since it uses as much as digits as its factorization.

40220065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044018.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40220065 is about 6341.9291229089. The cubic root of 40220065 is about 342.6212191026.

Adding to 40220065 its reverse (56002204), we get a palindrome (96222269).

The spelling of 40220065 in words is "forty million, two hundred twenty thousand, sixty-five".