56448221 has 4 divisors (see below), whose sum is σ = 59419200. Its totient is φ = 53477244.

The previous prime is 56448209. The next prime is 56448229. The reversal of 56448221 is 12284465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56448221 - 2¹⁰ = 56447197 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 (56448229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1485461 + ... + 1485498.

It is an arithmetic number, because the mean of its divisors is an integer number (14854800).

Almost surely, 2^56448221 is an apocalyptic number.

It is an amenable number.

56448221 is a deficient number, since it is larger than the sum of its proper divisors (2970979).

56448221 is a wasteful number, since it uses less digits than its factorization.

56448221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970978.

The product of its digits is 15360, while the sum is 32.

The square root of 56448221 is about 7513.2031118558. The cubic root of 56448221 is about 383.6042585489.

The spelling of 56448221 in words is "fifty-six million, four hundred forty-eight thousand, two hundred twenty-one".