40026221 has 2 divisors, whose sum is σ = 40026222. Its totient is φ = 40026220.

The previous prime is 40026197. The next prime is 40026227. The reversal of 40026221 is 12262004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25502500 + 14523721 = 5050^2 + 3811^2 .

It is a cyclic number.

It is not a de Polignac number, because 40026221 - 2⁶ = 40026157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40026221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40026227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20013110 + 20013111.

It is an arithmetic number, because the mean of its divisors is an integer number (20013111).

Almost surely, 2^40026221 is an apocalyptic number.

It is an amenable number.

40026221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40026221 is an equidigital number, since it uses as much as digits as its factorization.

40026221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40026221 is about 6326.6279327933. The cubic root of 40026221 is about 342.0699018112.

Adding to 40026221 its reverse (12262004), we get a palindrome (52288225).

The spelling of 40026221 in words is "forty million, twenty-six thousand, two hundred twenty-one".