431722561 has 2 divisors, whose sum is σ = 431722562. Its totient is φ = 431722560.

The previous prime is 431722519. The next prime is 431722573. The reversal of 431722561 is 165227134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374190336 + 57532225 = 19344^2 + 7585^2 .

It is a cyclic number.

It is not a de Polignac number, because 431722561 - 2⁷ = 431722433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (431762561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215861280 + 215861281.

It is an arithmetic number, because the mean of its divisors is an integer number (215861281).

Almost surely, 2^431722561 is an apocalyptic number.

It is an amenable number.

431722561 is a deficient number, since it is larger than the sum of its proper divisors (1).

431722561 is an equidigital number, since it uses as much as digits as its factorization.

431722561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 431722561 is about 20777.9344738595. The cubic root of 431722561 is about 755.7907660052.

Adding to 431722561 its reverse (165227134), we get a palindrome (596949695).

The spelling of 431722561 in words is "four hundred thirty-one million, seven hundred twenty-two thousand, five hundred sixty-one".