43145081 has 4 divisors (see below), whose sum is σ = 49308672. Its totient is φ = 36981492.

The previous prime is 43145057. The next prime is 43145093. The reversal of 43145081 is 18054134.

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 not a de Polignac number, because 43145081 - 2⁶ = 43145017 is a prime.

It is a super-2 number, since 2×43145081² = 3722996028993122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43145081.

It is not an unprimeable number, because it can be changed into a prime (43145041) 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, 3081785 + ... + 3081798.

It is an arithmetic number, because the mean of its divisors is an integer number (12327168).

Almost surely, 2^43145081 is an apocalyptic number.

It is an amenable number.

43145081 is a deficient number, since it is larger than the sum of its proper divisors (6163591).

43145081 is an equidigital number, since it uses as much as digits as its factorization.

43145081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163590.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 43145081 is about 6568.4915315466. The cubic root of 43145081 is about 350.7333765235.

The spelling of 43145081 in words is "forty-three million, one hundred forty-five thousand, eighty-one".