43431 has 8 divisors (see below), whose sum is σ = 59904. Its totient is φ = 27960.

The previous prime is 43427. The next prime is 43441. The reversal of 43431 is 13434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43431 - 2² = 43427 is a prime.

It is a super-2 number, since 2×43431² = 3772503522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141 + ... + 326.

It is an arithmetic number, because the mean of its divisors is an integer number (7488).

2⁴³⁴³¹ is an apocalyptic number.

43431 is a deficient number, since it is larger than the sum of its proper divisors (16473).

43431 is a wasteful number, since it uses less digits than its factorization.

43431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501.

The product of its digits is 144, while the sum is 15.

The square root of 43431 is about 208.4010556595. The cubic root of 43431 is about 35.1506432046.

Adding to 43431 its reverse (13434), we get a palindrome (56865).

It can be divided in two parts, 434 and 31, that added together give a triangular number (465 = T₃₀).

The spelling of 43431 in words is "forty-three thousand, four hundred thirty-one".