40221321 has 16 divisors (see below), whose sum is σ = 62131584. Its totient is φ = 22667904.

The previous prime is 40221301. The next prime is 40221343. The reversal of 40221321 is 12312204.

40221321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40221321 - 2¹⁷ = 40090249 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40221321.

It is not an unprimeable number, because it can be changed into a prime (40221301) 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 15 ways as a sum of consecutive naturals, for example, 11586 + ... + 14651.

It is an arithmetic number, because the mean of its divisors is an integer number (3883224).

Almost surely, 2^40221321 is an apocalyptic number.

It is an amenable number.

40221321 is a deficient number, since it is larger than the sum of its proper divisors (21910263).

40221321 is a wasteful number, since it uses less digits than its factorization.

40221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26320.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 40221321 is about 6342.0281456329. The cubic root of 40221321 is about 342.6247855461.

Adding to 40221321 its reverse (12312204), we get a palindrome (52533525).

The spelling of 40221321 in words is "forty million, two hundred twenty-one thousand, three hundred twenty-one".