40221593 has 2 divisors, whose sum is σ = 40221594. Its totient is φ = 40221592.

The previous prime is 40221589. The next prime is 40221607. The reversal of 40221593 is 39512204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20178064 + 20043529 = 4492^2 + 4477^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221593 - 2² = 40221589 is a prime.

It is not a weakly prime, because it can be changed into another prime (40221523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110796 + 20110797.

It is an arithmetic number, because the mean of its divisors is an integer number (20110797).

Almost surely, 2^40221593 is an apocalyptic number.

It is an amenable number.

40221593 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221593 is an equidigital number, since it uses as much as digits as its factorization.

40221593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40221593 is about 6342.0495898408. The cubic root of 40221593 is about 342.6255578872.

Adding to 40221593 its reverse (39512204), we get a palindrome (79733797).

It can be divided in two parts, 4022 and 1593, that multiplied together give a palindrome (6407046).

The spelling of 40221593 in words is "forty million, two hundred twenty-one thousand, five hundred ninety-three".