43204681 has 6 divisors (see below), whose sum is σ = 46783950. Its totient is φ = 39881088.

The previous prime is 43204663. The next prime is 43204687. The reversal of 43204681 is 18640234.

It can be written as a sum of positive squares in 3 ways, for example, as 2449225 + 40755456 = 1565^2 + 6384^2 .

It is not a de Polignac number, because 43204681 - 2²³ = 34816073 is a prime.

It is a super-3 number, since 3×43204681³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43204687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 127656 + ... + 127993.

It is an arithmetic number, because the mean of its divisors is an integer number (7797325).

Almost surely, 2^43204681 is an apocalyptic number.

It is an amenable number.

43204681 is a deficient number, since it is larger than the sum of its proper divisors (3579269).

43204681 is a wasteful number, since it uses less digits than its factorization.

43204681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255675 (or 255662 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 43204681 is about 6573.0267761512. The cubic root of 43204681 is about 350.8948015788.

The spelling of 43204681 in words is "forty-three million, two hundred four thousand, six hundred eighty-one".