440031223231021 has 8 divisors (see below), whose sum is σ = 441769213713464. Its totient is φ = 438295790499840.

The previous prime is 440031223230997. The next prime is 440031223231043. The reversal of 440031223231021 is 120132322130044.

It can be written as a sum of positive squares in 4 ways, for example, as 97892621164900 + 342138602066121 = 9894070^2 + 18496989^2 .

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 440031223231021 - 2⁹ = 440031223230509 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 (440031223231051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639093060 + ... + 639781213.

It is an arithmetic number, because the mean of its divisors is an integer number (55221151714183).

Almost surely, 2^{440031223231021} is an apocalyptic number.

It is an amenable number.

440031223231021 is a deficient number, since it is larger than the sum of its proper divisors (1737990482443).

440031223231021 is a wasteful number, since it uses less digits than its factorization.

440031223231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278875631.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 440031223231021 its reverse (120132322130044), we get a palindrome (560163545361065).

The spelling of 440031223231021 in words is "four hundred forty trillion, thirty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, twenty-one".