40322221 has 8 divisors (see below), whose sum is σ = 40864824. Its totient is φ = 39782400.

The previous prime is 40322213. The next prime is 40322263. The reversal of 40322221 is 12222304.

40322221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13912900 + 26409321 = 3730^2 + 5139^2 .

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 40322221 - 2³ = 40322213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40322195 and 40322204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40322291) 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 7 ways as a sum of consecutive naturals, for example, 57171 + ... + 57871.

It is an arithmetic number, because the mean of its divisors is an integer number (5108103).

Almost surely, 2^40322221 is an apocalyptic number.

It is an amenable number.

40322221 is a deficient number, since it is larger than the sum of its proper divisors (542603).

40322221 is an equidigital number, since it uses as much as digits as its factorization.

40322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

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

The square root of 40322221 is about 6349.9780314581. The cubic root of 40322221 is about 342.9110514026.

Adding to 40322221 its reverse (12222304), we get a palindrome (52544525).

The spelling of 40322221 in words is "forty million, three hundred twenty-two thousand, two hundred twenty-one".