431332043521 has 2 divisors, whose sum is σ = 431332043522. Its totient is φ = 431332043520.

The previous prime is 431332043411. The next prime is 431332043531. The reversal of 431332043521 is 125340233134.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314990337600 + 116341705921 = 561240^2 + 341089^2 .

It is a cyclic number.

It is not a de Polignac number, because 431332043521 - 2²⁹ = 430795172609 is a prime.

It is not a weakly prime, because it can be changed into another prime (431332043531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215666021760 + 215666021761.

It is an arithmetic number, because the mean of its divisors is an integer number (215666021761).

Almost surely, 2^431332043521 is an apocalyptic number.

It is an amenable number.

431332043521 is a deficient number, since it is larger than the sum of its proper divisors (1).

431332043521 is an equidigital number, since it uses as much as digits as its factorization.

431332043521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 431332043521 its reverse (125340233134), we get a palindrome (556672276655).

The spelling of 431332043521 in words is "four hundred thirty-one billion, three hundred thirty-two million, forty-three thousand, five hundred twenty-one".