240404331421 has 8 divisors (see below), whose sum is σ = 241401144320. Its totient is φ = 239408446608.

The previous prime is 240404331379. The next prime is 240404331481. The reversal of 240404331421 is 124133404042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240404331421 - 2⁹ = 240404330909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240404331421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240404331481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289540 + ... + 751426.

It is an arithmetic number, because the mean of its divisors is an integer number (30175143040).

Almost surely, 2^240404331421 is an apocalyptic number.

It is an amenable number.

240404331421 is a deficient number, since it is larger than the sum of its proper divisors (996812899).

240404331421 is a wasteful number, since it uses less digits than its factorization.

240404331421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464043.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 240404331421 its reverse (124133404042), we get a palindrome (364537735463).

The spelling of 240404331421 in words is "two hundred forty billion, four hundred four million, three hundred thirty-one thousand, four hundred twenty-one".