440240400221 has 4 divisors (see below), whose sum is σ = 442179785472. Its totient is φ = 438301014972.

The previous prime is 440240400191. The next prime is 440240400233. The reversal of 440240400221 is 122004042044.

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 440240400221 - 2¹⁴ = 440240383837 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 (440240400251) 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, 969692285 + ... + 969692738.

It is an arithmetic number, because the mean of its divisors is an integer number (110544946368).

Almost surely, 2^440240400221 is an apocalyptic number.

It is an amenable number.

440240400221 is a deficient number, since it is larger than the sum of its proper divisors (1939385251).

440240400221 is a wasteful number, since it uses less digits than its factorization.

440240400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939385250.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 440240400221 its reverse (122004042044), we get a palindrome (562244442265).

The spelling of 440240400221 in words is "four hundred forty billion, two hundred forty million, four hundred thousand, two hundred twenty-one".