431231 has 4 divisors (see below), whose sum is σ = 438600. Its totient is φ = 423864.

The previous prime is 431219. The next prime is 431237. The reversal of 431231 is 132134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132134 = 2 ⋅66067.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431231 is a prime.

It is a super-2 number, since 2×431231² = 371920350722, 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 (431237) 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, 3596 + ... + 3713.

It is an arithmetic number, because the mean of its divisors is an integer number (109650).

2⁴³¹²³¹ is an apocalyptic number.

431231 is a deficient number, since it is larger than the sum of its proper divisors (7369).

431231 is an equidigital number, since it uses as much as digits as its factorization.

431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368.

The product of its digits is 72, while the sum is 14.

The square root of 431231 is about 656.6818103161. The cubic root of 431231 is about 75.5503808291.

Adding to 431231 its reverse (132134), we get a palindrome (563365).

The spelling of 431231 in words is "four hundred thirty-one thousand, two hundred thirty-one".