43402243 has 4 divisors (see below), whose sum is σ = 43823728. Its totient is φ = 42980760.

The previous prime is 43402237. The next prime is 43402253. The reversal of 43402243 is 34220434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34220434 = 2 ⋅17110217.

It is a cyclic number.

It is not a de Polignac number, because 43402243 - 2⁵ = 43402211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43402253) 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, 210588 + ... + 210793.

It is an arithmetic number, because the mean of its divisors is an integer number (10955932).

Almost surely, 2^43402243 is an apocalyptic number.

43402243 is a deficient number, since it is larger than the sum of its proper divisors (421485).

43402243 is a wasteful number, since it uses less digits than its factorization.

43402243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421484.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 43402243 is about 6588.0378717794. The cubic root of 43402243 is about 351.4288338462.

Adding to 43402243 its reverse (34220434), we get a palindrome (77622677).

The spelling of 43402243 in words is "forty-three million, four hundred two thousand, two hundred forty-three".