431040324121321 has 4 divisors (see below), whose sum is σ = 438106558943044. Its totient is φ = 423974089299600.

The previous prime is 431040324121283. The next prime is 431040324121361. The reversal of 431040324121321 is 123121423040134.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153254768511321 + 277785555610000 = 12379611^2 + 16666900^2 .

It is a cyclic number.

It is not a de Polignac number, because 431040324121321 - 2¹³ = 431040324113129 is a prime.

It is a super-2 number, since 2×431040324121321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431040324121361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3533117410770 + ... + 3533117410891.

It is an arithmetic number, because the mean of its divisors is an integer number (109526639735761).

Almost surely, 2^{431040324121321} is an apocalyptic number.

It is an amenable number.

431040324121321 is a deficient number, since it is larger than the sum of its proper divisors (7066234821723).

431040324121321 is an equidigital number, since it uses as much as digits as its factorization.

431040324121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066234821722.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 431040324121321 its reverse (123121423040134), we get a palindrome (554161747161455).

The spelling of 431040324121321 in words is "four hundred thirty-one trillion, forty billion, three hundred twenty-four million, one hundred twenty-one thousand, three hundred twenty-one".