431312431 has 4 divisors (see below), whose sum is σ = 470522664. Its totient is φ = 392102200.

The previous prime is 431312417. The next prime is 431312443. The reversal of 431312431 is 134213134.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 431312431 - 2⁷ = 431312303 is a prime.

It is a super-2 number, since 2×431312431² = 372060826270259522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431312461) 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 in 3 ways as a sum of consecutive naturals, for example, 19605100 + ... + 19605121.

It is an arithmetic number, because the mean of its divisors is an integer number (117630666).

Almost surely, 2^431312431 is an apocalyptic number.

431312431 is a deficient number, since it is larger than the sum of its proper divisors (39210233).

431312431 is a wasteful number, since it uses less digits than its factorization.

431312431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39210232.

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

The square root of 431312431 is about 20768.0627647357. The cubic root of 431312431 is about 755.5513601899.

Adding to 431312431 its reverse (134213134), we get a palindrome (565525565).

The spelling of 431312431 in words is "four hundred thirty-one million, three hundred twelve thousand, four hundred thirty-one".