43802081 has 4 divisors (see below), whose sum is σ = 46378692. Its totient is φ = 41225472.

The previous prime is 43802053. The next prime is 43802111. The reversal of 43802081 is 18020834.

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 35046400 + 8755681 = 5920^2 + 2959^2 .

It is a cyclic number.

It is not a de Polignac number, because 43802081 - 2¹⁰ = 43801057 is a prime.

It is a super-2 number, since 2×43802081² = 3837244599861122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43802081.

It is not an unprimeable number, because it can be changed into a prime (43802021) 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, 1288280 + ... + 1288313.

It is an arithmetic number, because the mean of its divisors is an integer number (11594673).

Almost surely, 2^43802081 is an apocalyptic number.

It is an amenable number.

43802081 is a deficient number, since it is larger than the sum of its proper divisors (2576611).

43802081 is a wasteful number, since it uses less digits than its factorization.

43802081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576610.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 43802081 is about 6618.3140602422. The cubic root of 43802081 is about 352.5047022494.

The spelling of 43802081 in words is "forty-three million, eight hundred two thousand, eighty-one".