43031 has 4 divisors (see below), whose sum is σ = 44232. Its totient is φ = 41832.

The previous prime is 43019. The next prime is 43037. The reversal of 43031 is 13034.

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 43031 - 2⁶ = 42967 is a prime.

It is a super-2 number, since 2×43031² = 3703333922, 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 (43037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (11058).

2⁴³⁰³¹ is an apocalyptic number.

43031 is a deficient number, since it is larger than the sum of its proper divisors (1201).

43031 is a wasteful number, since it uses less digits than its factorization.

43031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 43031 is about 207.4391477036. The cubic root of 43031 is about 35.0423976001.

Adding to 43031 its reverse (13034), we get a palindrome (56065).

The spelling of 43031 in words is "forty-three thousand, thirty-one".