431332261 has 2 divisors, whose sum is σ = 431332262. Its totient is φ = 431332260.

The previous prime is 431332229. The next prime is 431332309. The reversal of 431332261 is 162233134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312936100 + 118396161 = 17690^2 + 10881^2 .

It is a cyclic number.

It is not a de Polignac number, because 431332261 - 2⁵ = 431332229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431332201) 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, 215666130 + 215666131.

It is an arithmetic number, because the mean of its divisors is an integer number (215666131).

Almost surely, 2^431332261 is an apocalyptic number.

It is an amenable number.

431332261 is a deficient number, since it is larger than the sum of its proper divisors (1).

431332261 is an equidigital number, since it uses as much as digits as its factorization.

431332261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 431332261 is about 20768.5401749858. The cubic root of 431332261 is about 755.5629390771.

Adding to 431332261 its reverse (162233134), we get a palindrome (593565395).

The spelling of 431332261 in words is "four hundred thirty-one million, three hundred thirty-two thousand, two hundred sixty-one".