43140031 has 8 divisors (see below), whose sum is σ = 48063744. Its totient is φ = 38383320.

The previous prime is 43140011. The next prime is 43140037. The reversal of 43140031 is 13004134.

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

It is a cyclic number.

It is not a de Polignac number, because 43140031 - 2¹⁵ = 43107263 is a prime.

It is a super-2 number, since 2×43140031² = 3722124549361922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43139987 and 43140014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43140037) 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, 41205 + ... + 42238.

It is an arithmetic number, because the mean of its divisors is an integer number (6007968).

Almost surely, 2^43140031 is an apocalyptic number.

43140031 is a deficient number, since it is larger than the sum of its proper divisors (4923713).

43140031 is a wasteful number, since it uses less digits than its factorization.

43140031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83501.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 43140031 is about 6568.1071093581. The cubic root of 43140031 is about 350.7196918993.

Adding to 43140031 its reverse (13004134), we get a palindrome (56144165).

The spelling of 43140031 in words is "forty-three million, one hundred forty thousand, thirty-one".