43243641 has 24 divisors (see below), whose sum is σ = 71585280. Its totient is φ = 24641856.

The previous prime is 43243621. The next prime is 43243649. The reversal of 43243641 is 14634234.

It is not a de Polignac number, because 43243641 - 2⁷ = 43243513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43243649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29461 + ... + 30893.

It is an arithmetic number, because the mean of its divisors is an integer number (2982720).

Almost surely, 2^43243641 is an apocalyptic number.

It is an amenable number.

43243641 is a deficient number, since it is larger than the sum of its proper divisors (28341639).

43243641 is a wasteful number, since it uses less digits than its factorization.

43243641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925 (or 1922 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 43243641 is about 6575.9897353934. The cubic root of 43243641 is about 351.0002435043. Note that the first 3 decimals are identical.

Adding to 43243641 its reverse (14634234), we get a palindrome (57877875).

The spelling of 43243641 in words is "forty-three million, two hundred forty-three thousand, six hundred forty-one".