40221605 has 8 divisors (see below), whose sum is σ = 48424992. Its totient is φ = 32071248.

The previous prime is 40221593. The next prime is 40221607. The reversal of 40221605 is 50612204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40221605 - 2⁴ = 40221589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11567 + ... + 14636.

It is an arithmetic number, because the mean of its divisors is an integer number (6053124).

Almost surely, 2^40221605 is an apocalyptic number.

It is an amenable number.

40221605 is a deficient number, since it is larger than the sum of its proper divisors (8203387).

40221605 is a wasteful number, since it uses less digits than its factorization.

40221605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26515.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40221605 is about 6342.0505359071. The cubic root of 40221605 is about 342.6255919610.

Adding to 40221605 its reverse (50612204), we get a palindrome (90833809).

The spelling of 40221605 in words is "forty million, two hundred twenty-one thousand, six hundred five".