431134321 has 2 divisors, whose sum is σ = 431134322. Its totient is φ = 431134320.

The previous prime is 431134309. The next prime is 431134343. The reversal of 431134321 is 123431134.

It is an a-pointer prime, because the next prime (431134343) can be obtained adding 431134321 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255200625 + 175933696 = 15975^2 + 13264^2 .

It is a cyclic number.

It is not a de Polignac number, because 431134321 - 2⁵ = 431134289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 431134292 and 431134301.

It is not a weakly prime, because it can be changed into another prime (431134021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215567160 + 215567161.

It is an arithmetic number, because the mean of its divisors is an integer number (215567161).

Almost surely, 2^431134321 is an apocalyptic number.

It is an amenable number.

431134321 is a deficient number, since it is larger than the sum of its proper divisors (1).

431134321 is an equidigital number, since it uses as much as digits as its factorization.

431134321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 431134321 is about 20763.7742474724. The cubic root of 431134321 is about 755.4473444997.

Adding to 431134321 its reverse (123431134), we get a palindrome (554565455).

The spelling of 431134321 in words is "four hundred thirty-one million, one hundred thirty-four thousand, three hundred twenty-one".