431222191 has 2 divisors, whose sum is σ = 431222192. Its totient is φ = 431222190.

The previous prime is 431222173. The next prime is 431222261. The reversal of 431222191 is 191222134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 431222191 - 2¹⁹ = 430697903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431222111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215611095 + 215611096.

It is an arithmetic number, because the mean of its divisors is an integer number (215611096).

Almost surely, 2^431222191 is an apocalyptic number.

431222191 is a deficient number, since it is larger than the sum of its proper divisors (1).

431222191 is an equidigital number, since it uses as much as digits as its factorization.

431222191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 431222191 is about 20765.8900844630. The cubic root of 431222191 is about 755.4986638880.

The spelling of 431222191 in words is "four hundred thirty-one million, two hundred twenty-two thousand, one hundred ninety-one".