440450523130221 has 12 divisors (see below), whose sum is σ = 636209069844348. Its totient is φ = 293632408860864.

The previous prime is 440450523130169. The next prime is 440450523130229. The reversal of 440450523130221 is 122031325054044.

It is a happy number.

440450523130221 is a `hidden beast` number, since 4 + 4 + 0 + 450 + 52 + 3 + 130 + 2 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 239694212807721 + 200756310322500 = 15482061^2 + 14168850^2 .

It is not a de Polignac number, because 440450523130221 - 2³⁰ = 440449449388397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440450523130229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103908870 + ... + 108064583.

It is an arithmetic number, because the mean of its divisors is an integer number (53017422487029).

Almost surely, 2^{440450523130221} is an apocalyptic number.

It is an amenable number.

440450523130221 is a deficient number, since it is larger than the sum of its proper divisors (195758546714127).

440450523130221 is a wasteful number, since it uses less digits than its factorization.

440450523130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212204332 (or 212204329 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 440450523130221 its reverse (122031325054044), we get a palindrome (562481848184265).

The spelling of 440450523130221 in words is "four hundred forty trillion, four hundred fifty billion, five hundred twenty-three million, one hundred thirty thousand, two hundred twenty-one".