43682081 has 4 divisors (see below), whose sum is σ = 44015664. Its totient is φ = 43348500.

The previous prime is 43682053. The next prime is 43682087. The reversal of 43682081 is 18028634.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43682081 is a prime.

It is a super-2 number, since 2×43682081² = 3816248400981122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43682087) 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, 166595 + ... + 166856.

It is an arithmetic number, because the mean of its divisors is an integer number (11003916).

Almost surely, 2^43682081 is an apocalyptic number.

It is an amenable number.

43682081 is a deficient number, since it is larger than the sum of its proper divisors (333583).

43682081 is a wasteful number, since it uses less digits than its factorization.

43682081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333582.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 43682081 is about 6609.2420896802. The cubic root of 43682081 is about 352.1825010280.

The spelling of 43682081 in words is "forty-three million, six hundred eighty-two thousand, eighty-one".