431420231 has 4 divisors (see below), whose sum is σ = 470640264. Its totient is φ = 392200200.

The previous prime is 431420221. The next prime is 431420233. The reversal of 431420231 is 132024134.

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 431420231 - 2⁶ = 431420167 is a prime.

It is a super-2 number, since 2×431420231² = 372246831432186722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431420233) 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, 19610000 + ... + 19610021.

It is an arithmetic number, because the mean of its divisors is an integer number (117660066).

Almost surely, 2^431420231 is an apocalyptic number.

431420231 is a deficient number, since it is larger than the sum of its proper divisors (39220033).

431420231 is a wasteful number, since it uses less digits than its factorization.

431420231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39220032.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 431420231 is about 20770.6579337295. The cubic root of 431420231 is about 755.6143011473.

Adding to 431420231 its reverse (132024134), we get a palindrome (563444365).

The spelling of 431420231 in words is "four hundred thirty-one million, four hundred twenty thousand, two hundred thirty-one".