56549921 has 8 divisors (see below), whose sum is σ = 58485504. Its totient is φ = 54621360.

The previous prime is 56549917. The next prime is 56549957. The reversal of 56549921 is 12994565.

56549921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56549921 - 2² = 56549917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56549981) 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 7 ways as a sum of consecutive naturals, for example, 18515 + ... + 21351.

It is an arithmetic number, because the mean of its divisors is an integer number (7310688).

Almost surely, 2^56549921 is an apocalyptic number.

It is an amenable number.

56549921 is a deficient number, since it is larger than the sum of its proper divisors (1935583).

56549921 is a wasteful number, since it uses less digits than its factorization.

56549921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511.

The product of its digits is 97200, while the sum is 41.

The square root of 56549921 is about 7519.9681515283. The cubic root of 56549921 is about 383.8344940156.

The spelling of 56549921 in words is "fifty-six million, five hundred forty-nine thousand, nine hundred twenty-one".