431134328321 has 2 divisors, whose sum is σ = 431134328322. Its totient is φ = 431134328320.

The previous prime is 431134328257. The next prime is 431134328389. The reversal of 431134328321 is 123823431134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281934450625 + 149199877696 = 530975^2 + 386264^2 .

It is a cyclic number.

It is not a de Polignac number, because 431134328321 - 2⁶ = 431134328257 is a prime.

It is not a weakly prime, because it can be changed into another prime (431134328021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215567164160 + 215567164161.

It is an arithmetic number, because the mean of its divisors is an integer number (215567164161).

Almost surely, 2^431134328321 is an apocalyptic number.

It is an amenable number.

431134328321 is a deficient number, since it is larger than the sum of its proper divisors (1).

431134328321 is an equidigital number, since it uses as much as digits as its factorization.

431134328321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 35.

Adding to 431134328321 its reverse (123823431134), we get a palindrome (554957759455).

The spelling of 431134328321 in words is "four hundred thirty-one billion, one hundred thirty-four million, three hundred twenty-eight thousand, three hundred twenty-one".