431023431 has 4 divisors (see below), whose sum is σ = 574697912. Its totient is φ = 287348952.

The previous prime is 431023429. The next prime is 431023441. The reversal of 431023431 is 134320134.

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

It is not a de Polignac number, because 431023431 - 2¹ = 431023429 is a prime.

It is a super-2 number, since 2×431023431² = 371562396142023522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431023398 and 431023407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431023421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71837236 + ... + 71837241.

It is an arithmetic number, because the mean of its divisors is an integer number (143674478).

Almost surely, 2^431023431 is an apocalyptic number.

431023431 is a deficient number, since it is larger than the sum of its proper divisors (143674481).

431023431 is a wasteful number, since it uses less digits than its factorization.

431023431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143674480.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 431023431 is about 20761.1038001355. The cubic root of 431023431 is about 755.3825706112.

Adding to 431023431 its reverse (134320134), we get a palindrome (565343565).

The spelling of 431023431 in words is "four hundred thirty-one million, twenty-three thousand, four hundred thirty-one".