43648561 has 8 divisors (see below), whose sum is σ = 47697984. Its totient is φ = 39612720.

The previous prime is 43648547. The next prime is 43648597. The reversal of 43648561 is 16584634.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43648561 - 2¹¹ = 43646513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43648561.

It is not an unprimeable number, because it can be changed into a prime (43648511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4051 + ... + 10183.

It is an arithmetic number, because the mean of its divisors is an integer number (5962248).

Almost surely, 2^43648561 is an apocalyptic number.

It is an amenable number.

43648561 is a deficient number, since it is larger than the sum of its proper divisors (4049423).

43648561 is a wasteful number, since it uses less digits than its factorization.

43648561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6791.

The product of its digits is 69120, while the sum is 37.

The square root of 43648561 is about 6606.7057600592. The cubic root of 43648561 is about 352.0923940699.

The spelling of 43648561 in words is "forty-three million, six hundred forty-eight thousand, five hundred sixty-one".