440210242421 has 8 divisors (see below), whose sum is σ = 451629324888. Its totient is φ = 428823648000.

The previous prime is 440210242357. The next prime is 440210242427. The reversal of 440210242421 is 124242012044.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35696434225 + 404513808196 = 188935^2 + 636014^2 .

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 440210242421 - 2⁶ = 440210242357 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 (440210242427) 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, 8094560 + ... + 8148761.

It is an arithmetic number, because the mean of its divisors is an integer number (56453665611).

Almost surely, 2^440210242421 is an apocalyptic number.

440210242421 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

440210242421 is a deficient number, since it is larger than the sum of its proper divisors (11419082467).

440210242421 is a wasteful number, since it uses less digits than its factorization.

440210242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16244023.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 440210242421 its reverse (124242012044), we get a palindrome (564452254465).

The spelling of 440210242421 in words is "four hundred forty billion, two hundred ten million, two hundred forty-two thousand, four hundred twenty-one".