43340281 has 4 divisors (see below), whose sum is σ = 43463412. Its totient is φ = 43217152.

The previous prime is 43340261. The next prime is 43340287. The reversal of 43340281 is 18204334.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6325225 + 37015056 = 2515^2 + 6084^2 .

It is a cyclic number.

It is not a de Polignac number, because 43340281 - 2⁵ = 43340249 is a prime.

It is a super-2 number, since 2×43340281² = 3756759914317922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43340287) 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, 61036 + ... + 61741.

It is an arithmetic number, because the mean of its divisors is an integer number (10865853).

Almost surely, 2^43340281 is an apocalyptic number.

It is an amenable number.

43340281 is a deficient number, since it is larger than the sum of its proper divisors (123131).

43340281 is a wasteful number, since it uses less digits than its factorization.

43340281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123130.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 43340281 is about 6583.3335780591. Note that the first 3 decimals coincide. The cubic root of 43340281 is about 351.2615183467.

The spelling of 43340281 in words is "forty-three million, three hundred forty thousand, two hundred eighty-one".