40040324221 has 2 divisors, whose sum is σ = 40040324222. Its totient is φ = 40040324220.

The previous prime is 40040324201. The next prime is 40040324231. The reversal of 40040324221 is 12242304004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20660900121 + 19379424100 = 143739^2 + 139210^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040324221 - 2⁹ = 40040323709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40040324192 and 40040324201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40040324201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20020162110 + 20020162111.

It is an arithmetic number, because the mean of its divisors is an integer number (20020162111).

Almost surely, 2^40040324221 is an apocalyptic number.

It is an amenable number.

40040324221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040324221 is an equidigital number, since it uses as much as digits as its factorization.

40040324221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 40040324221 its reverse (12242304004), we get a palindrome (52282628225).

The spelling of 40040324221 in words is "forty billion, forty million, three hundred twenty-four thousand, two hundred twenty-one".