431240422325521 has 2 divisors, whose sum is σ = 431240422325522. Its totient is φ = 431240422325520.

The previous prime is 431240422325491. The next prime is 431240422325567. The reversal of 431240422325521 is 125523224042134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359241379024896 + 71999043300625 = 18953664^2 + 8485225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431240422325521 is a prime.

It is not a weakly prime, because it can be changed into another prime (431240422325221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215620211162760 + 215620211162761.

It is an arithmetic number, because the mean of its divisors is an integer number (215620211162761).

Almost surely, 2^{431240422325521} is an apocalyptic number.

It is an amenable number.

431240422325521 is a deficient number, since it is larger than the sum of its proper divisors (1).

431240422325521 is an equidigital number, since it uses as much as digits as its factorization.

431240422325521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 431240422325521 its reverse (125523224042134), we get a palindrome (556763646367655).

The spelling of 431240422325521 in words is "four hundred thirty-one trillion, two hundred forty billion, four hundred twenty-two million, three hundred twenty-five thousand, five hundred twenty-one".