43231 has 4 divisors (see below), whose sum is σ = 45792. Its totient is φ = 40672.

The previous prime is 43223. The next prime is 43237. The reversal of 43231 is 13234.

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 43231 - 2³ = 43223 is a prime.

It is a super-2 number, since 2×43231² = 3737838722, which contains 22 as substring.

It is a Duffinian number.

43231 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43237) 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, 1255 + ... + 1288.

It is an arithmetic number, because the mean of its divisors is an integer number (11448).

2⁴³²³¹ is an apocalyptic number.

43231 is the 132-nd centered pentagonal number.

43231 is a deficient number, since it is larger than the sum of its proper divisors (2561).

43231 is a wasteful number, since it uses less digits than its factorization.

43231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560.

The product of its digits is 72, while the sum is 13.

The square root of 43231 is about 207.9206579443. The cubic root of 43231 is about 35.0966038656.

Adding to 43231 its reverse (13234), we get a palindrome (56465).

The spelling of 43231 in words is "forty-three thousand, two hundred thirty-one".