40304221 has 4 divisors (see below), whose sum is σ = 41064732. Its totient is φ = 39543712.

The previous prime is 40304213. The next prime is 40304227. The reversal of 40304221 is 12240304.

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 10208025 + 30096196 = 3195^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 40304221 - 2³ = 40304213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40304195 and 40304204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40304227) 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, 380176 + ... + 380281.

It is an arithmetic number, because the mean of its divisors is an integer number (10266183).

Almost surely, 2^40304221 is an apocalyptic number.

It is an amenable number.

40304221 is a deficient number, since it is larger than the sum of its proper divisors (760511).

40304221 is an equidigital number, since it uses as much as digits as its factorization.

40304221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760510.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40304221 is about 6348.5605455095. The cubic root of 40304221 is about 342.8600181885.

Adding to 40304221 its reverse (12240304), we get a palindrome (52544525).

The spelling of 40304221 in words is "forty million, three hundred four thousand, two hundred twenty-one".