43148591 has 4 divisors (see below), whose sum is σ = 43170072. Its totient is φ = 43127112.

The previous prime is 43148579. The next prime is 43148597. The reversal of 43148591 is 19584134.

43148591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43148591 - 2⁶ = 43148527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43148597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7376 + ... + 11861.

It is an arithmetic number, because the mean of its divisors is an integer number (10792518).

Almost surely, 2^43148591 is an apocalyptic number.

43148591 is a deficient number, since it is larger than the sum of its proper divisors (21481).

43148591 is a wasteful number, since it uses less digits than its factorization.

43148591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21480.

The product of its digits is 17280, while the sum is 35.

The square root of 43148591 is about 6568.7587107459. The cubic root of 43148591 is about 350.7428873857.

The spelling of 43148591 in words is "forty-three million, one hundred forty-eight thousand, five hundred ninety-one".