40221943 has 4 divisors (see below), whose sum is σ = 41203008. Its totient is φ = 39240880.

The previous prime is 40221913. The next prime is 40221947. The reversal of 40221943 is 34912204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40221943 - 2⁹ = 40221431 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 (40221947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490471 + ... + 490552.

It is an arithmetic number, because the mean of its divisors is an integer number (10300752).

Almost surely, 2^40221943 is an apocalyptic number.

40221943 is a deficient number, since it is larger than the sum of its proper divisors (981065).

40221943 is an equidigital number, since it uses as much as digits as its factorization.

40221943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981064.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40221943 is about 6342.0771833840. The cubic root of 40221943 is about 342.6265517032.

The spelling of 40221943 in words is "forty million, two hundred twenty-one thousand, nine hundred forty-three".