56443521 has 8 divisors (see below), whose sum is σ = 75371904. Its totient is φ = 37572080.

The previous prime is 56443507. The next prime is 56443531. The reversal of 56443521 is 12534465.

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 56443521 - 2⁵ = 56443489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56443531) 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, 11865 + ... + 15926.

It is an arithmetic number, because the mean of its divisors is an integer number (9421488).

Almost surely, 2^56443521 is an apocalyptic number.

It is an amenable number.

56443521 is a deficient number, since it is larger than the sum of its proper divisors (18928383).

56443521 is a wasteful number, since it uses less digits than its factorization.

56443521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28471.

The product of its digits is 14400, while the sum is 30.

The square root of 56443521 is about 7512.8903226388. The cubic root of 56443521 is about 383.5936116822.

Adding to 56443521 its reverse (12534465), we get a palindrome (68977986).

The spelling of 56443521 in words is "fifty-six million, four hundred forty-three thousand, five hundred twenty-one".