40040323221 has 16 divisors (see below), whose sum is σ = 53787714624. Its totient is φ = 26493320064.

The previous prime is 40040323133. The next prime is 40040323223. The reversal of 40040323221 is 12232304004.

It is not a de Polignac number, because 40040323221 - 2¹⁰ = 40040322197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040323223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3748330 + ... + 3758996.

It is an arithmetic number, because the mean of its divisors is an integer number (3361732164).

Almost surely, 2^40040323221 is an apocalyptic number.

It is an amenable number.

40040323221 is a deficient number, since it is larger than the sum of its proper divisors (13747391403).

40040323221 is a wasteful number, since it uses less digits than its factorization.

40040323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19940.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 40040323221 its reverse (12232304004), we get a palindrome (52272627225).

The spelling of 40040323221 in words is "forty billion, forty million, three hundred twenty-three thousand, two hundred twenty-one".