431321311 has 2 divisors, whose sum is σ = 431321312. Its totient is φ = 431321310.

The previous prime is 431321287. The next prime is 431321327. The reversal of 431321311 is 113123134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 431321311 - 2⁵ = 431321279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (431351311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215660655 + 215660656.

It is an arithmetic number, because the mean of its divisors is an integer number (215660656).

Almost surely, 2^431321311 is an apocalyptic number.

431321311 is a deficient number, since it is larger than the sum of its proper divisors (1).

431321311 is an equidigital number, since it uses as much as digits as its factorization.

431321311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 431321311 is about 20768.2765534360. The cubic root of 431321311 is about 755.5565453330.

Adding to 431321311 its reverse (113123134), we get a palindrome (544444445).

The spelling of 431321311 in words is "four hundred thirty-one million, three hundred twenty-one thousand, three hundred eleven".