431243340221 has 8 divisors (see below), whose sum is σ = 450156153600. Its totient is φ = 412643135520.

The previous prime is 431243340211. The next prime is 431243340247. The reversal of 431243340221 is 122043342134.

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 431243340221 - 2¹⁴ = 431243323837 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 (431243340211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78149351 + ... + 78154868.

It is an arithmetic number, because the mean of its divisors is an integer number (56269519200).

Almost surely, 2^431243340221 is an apocalyptic number.

It is an amenable number.

431243340221 is a deficient number, since it is larger than the sum of its proper divisors (18912813379).

431243340221 is a wasteful number, since it uses less digits than its factorization.

431243340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156304339.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 431243340221 its reverse (122043342134), we get a palindrome (553286682355).

The spelling of 431243340221 in words is "four hundred thirty-one billion, two hundred forty-three million, three hundred forty thousand, two hundred twenty-one".