431240422325221 has 2 divisors, whose sum is σ = 431240422325222. Its totient is φ = 431240422325220.

The previous prime is 431240422325189. The next prime is 431240422325231. The reversal of 431240422325221 is 122523224042134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429303067336900 + 1937354988321 = 20719630^2 + 1391889^2 .

It is a cyclic number.

It is not a de Polignac number, because 431240422325221 - 2⁵ = 431240422325189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431240422325231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215620211162610 + 215620211162611.

It is an arithmetic number, because the mean of its divisors is an integer number (215620211162611).

Almost surely, 2^{431240422325221} is an apocalyptic number.

It is an amenable number.

431240422325221 is a deficient number, since it is larger than the sum of its proper divisors (1).

431240422325221 is an equidigital number, since it uses as much as digits as its factorization.

431240422325221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 431240422325221 its reverse (122523224042134), we get a palindrome (553763646367355).

The spelling of 431240422325221 in words is "four hundred thirty-one trillion, two hundred forty billion, four hundred twenty-two million, three hundred twenty-five thousand, two hundred twenty-one".