440342321552421 has 4 divisors (see below), whose sum is σ = 587123095403232. Its totient is φ = 293561547701612.

The previous prime is 440342321552383. The next prime is 440342321552437. The reversal of 440342321552421 is 124255123243044.

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 440342321552421 - 2³⁴ = 440325141683237 is a prime.

It is a super-2 number, since 2×440342321552421² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440342321552821) 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, 73390386925401 + ... + 73390386925406.

It is an arithmetic number, because the mean of its divisors is an integer number (146780773850808).

Almost surely, 2^{440342321552421} is an apocalyptic number.

It is an amenable number.

440342321552421 is a deficient number, since it is larger than the sum of its proper divisors (146780773850811).

440342321552421 is a wasteful number, since it uses less digits than its factorization.

440342321552421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146780773850810.

The product of its (nonzero) digits is 921600, while the sum is 42.

Adding to 440342321552421 its reverse (124255123243044), we get a palindrome (564597444795465).

The spelling of 440342321552421 in words is "four hundred forty trillion, three hundred forty-two billion, three hundred twenty-one million, five hundred fifty-two thousand, four hundred twenty-one".