40040343221 has 4 divisors (see below), whose sum is σ = 40637960352. Its totient is φ = 39442726092.

The previous prime is 40040343199. The next prime is 40040343229. The reversal of 40040343221 is 12234304004.

40040343221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40040343221 - 2¹⁰ = 40040342197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040343229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298808465 + ... + 298808598.

It is an arithmetic number, because the mean of its divisors is an integer number (10159490088).

Almost surely, 2^40040343221 is an apocalyptic number.

It is an amenable number.

40040343221 is a deficient number, since it is larger than the sum of its proper divisors (597617131).

40040343221 is an equidigital number, since it uses as much as digits as its factorization.

40040343221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597617130.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 40040343221 its reverse (12234304004), we get a palindrome (52274647225).

The spelling of 40040343221 in words is "forty billion, forty million, three hundred forty-three thousand, two hundred twenty-one".