43055621 has 8 divisors (see below), whose sum is σ = 50793984. Its totient is φ = 35714160.

The previous prime is 43055567. The next prime is 43055627. The reversal of 43055621 is 12655034.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43055621 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 (43055627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98990 + ... + 99423.

It is an arithmetic number, because the mean of its divisors is an integer number (6349248).

Almost surely, 2^43055621 is an apocalyptic number.

It is an amenable number.

43055621 is a deficient number, since it is larger than the sum of its proper divisors (7738363).

43055621 is a wasteful number, since it uses less digits than its factorization.

43055621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198451.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 43055621 is about 6561.6782152129. The cubic root of 43055621 is about 350.4907971587.

The spelling of 43055621 in words is "forty-three million, fifty-five thousand, six hundred twenty-one".