56748221 has 4 divisors (see below), whose sum is σ = 56767200. Its totient is φ = 56729244.

The previous prime is 56748217. The next prime is 56748253. The reversal of 56748221 is 12284765.

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 56748221 - 2² = 56748217 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 (56748281) 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, 3911 + ... + 11348.

It is an arithmetic number, because the mean of its divisors is an integer number (14191800).

Almost surely, 2^56748221 is an apocalyptic number.

It is an amenable number.

56748221 is a deficient number, since it is larger than the sum of its proper divisors (18979).

56748221 is a wasteful number, since it uses less digits than its factorization.

56748221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18978.

The product of its digits is 26880, while the sum is 35.

The square root of 56748221 is about 7533.1415093572. The cubic root of 56748221 is about 384.2826265874.

The spelling of 56748221 in words is "fifty-six million, seven hundred forty-eight thousand, two hundred twenty-one".