43612081 has 2 divisors, whose sum is σ = 43612082. Its totient is φ = 43612080.

The previous prime is 43612031. The next prime is 43612111. The reversal of 43612081 is 18021634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36000000 + 7612081 = 6000^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 43612081 - 2⁹ = 43611569 is a prime.

It is a super-2 number, since 2×43612081² = 3804027218301122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43612031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21806040 + 21806041.

It is an arithmetic number, because the mean of its divisors is an integer number (21806041).

Almost surely, 2^43612081 is an apocalyptic number.

It is an amenable number.

43612081 is a deficient number, since it is larger than the sum of its proper divisors (1).

43612081 is an equidigital number, since it uses as much as digits as its factorization.

43612081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 43612081 is about 6603.9443516735. The cubic root of 43612081 is about 351.9942777350.

The spelling of 43612081 in words is "forty-three million, six hundred twelve thousand, eighty-one".