43081081 has 2 divisors, whose sum is σ = 43081082. Its totient is φ = 43081080.

The previous prime is 43081057. The next prime is 43081097. The reversal of 43081081 is 18018034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40755456 + 2325625 = 6384^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 43081081 - 2¹³ = 43072889 is a prime.

It is a super-2 number, since 2×43081081² = 3711959080257122, which contains 22 as substring.

It is equal to p_2609125 and since 43081081 and 2609125 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (43081021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21540540 + 21540541.

It is an arithmetic number, because the mean of its divisors is an integer number (21540541).

Almost surely, 2^43081081 is an apocalyptic number.

It is an amenable number.

43081081 is a deficient number, since it is larger than the sum of its proper divisors (1).

43081081 is an equidigital number, since it uses as much as digits as its factorization.

43081081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 43081081 is about 6563.6179809614. The cubic root of 43081081 is about 350.5598685689.

The spelling of 43081081 in words is "forty-three million, eighty-one thousand, eighty-one".