43190561 has 4 divisors (see below), whose sum is σ = 43241472. Its totient is φ = 43139652.

The previous prime is 43190549. The next prime is 43190579. The reversal of 43190561 is 16509134.

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 a de Polignac number, because none of the positive numbers 2^k-43190561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43190531) 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, 24161 + ... + 25886.

It is an arithmetic number, because the mean of its divisors is an integer number (10810368).

Almost surely, 2^43190561 is an apocalyptic number.

It is an amenable number.

43190561 is a deficient number, since it is larger than the sum of its proper divisors (50911).

43190561 is an equidigital number, since it uses as much as digits as its factorization.

43190561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50910.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 43190561 is about 6571.9526017767. The cubic root of 43190561 is about 350.8565713505.

Adding to 43190561 its reverse (16509134), we get a palindrome (59699695).

The spelling of 43190561 in words is "forty-three million, one hundred ninety thousand, five hundred sixty-one".