43740231 has 4 divisors (see below), whose sum is σ = 58320312. Its totient is φ = 29160152.

The previous prime is 43740187. The next prime is 43740247. The reversal of 43740231 is 13204734.

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 43740231 - 2¹¹ = 43738183 is a prime.

It is a super-2 number, since 2×43740231² = 3826415615866722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43740251) 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, 7290036 + ... + 7290041.

It is an arithmetic number, because the mean of its divisors is an integer number (14580078).

Almost surely, 2^43740231 is an apocalyptic number.

43740231 is a deficient number, since it is larger than the sum of its proper divisors (14580081).

43740231 is a wasteful number, since it uses less digits than its factorization.

43740231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14580080.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 43740231 is about 6613.6397694462. The cubic root of 43740231 is about 352.3387079609.

Adding to 43740231 its reverse (13204734), we get a palindrome (56944965).

The spelling of 43740231 in words is "forty-three million, seven hundred forty thousand, two hundred thirty-one".