56221345 has 4 divisors (see below), whose sum is σ = 67465620. Its totient is φ = 44977072.

The previous prime is 56221327. The next prime is 56221349. The reversal of 56221345 is 54312265.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18974736 + 37246609 = 4356^2 + 6103^2 .

It is a cyclic number.

It is not a de Polignac number, because 56221345 - 2⁵ = 56221313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56221349) 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, 5622130 + ... + 5622139.

It is an arithmetic number, because the mean of its divisors is an integer number (16866405).

Almost surely, 2^56221345 is an apocalyptic number.

It is an amenable number.

56221345 is a deficient number, since it is larger than the sum of its proper divisors (11244275).

56221345 is a wasteful number, since it uses less digits than its factorization.

56221345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11244274.

The product of its digits is 7200, while the sum is 28.

The square root of 56221345 is about 7498.0894233131. The cubic root of 56221345 is about 383.0896426366.

The spelling of 56221345 in words is "fifty-six million, two hundred twenty-one thousand, three hundred forty-five".