56660213 has 4 divisors (see below), whose sum is σ = 56675340. Its totient is φ = 56645088.

The previous prime is 56660189. The next prime is 56660221. The reversal of 56660213 is 31206665.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 47430769 + 9229444 = 6887^2 + 3038^2 .

It is a cyclic number.

It is not a de Polignac number, because 56660213 - 2²⁰ = 55611637 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 (56660243) 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, 2681 + ... + 10977.

It is an arithmetic number, because the mean of its divisors is an integer number (14168835).

Almost surely, 2^56660213 is an apocalyptic number.

It is an amenable number.

56660213 is a deficient number, since it is larger than the sum of its proper divisors (15127).

56660213 is an equidigital number, since it uses as much as digits as its factorization.

56660213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15126.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 56660213 is about 7527.2978551403. The cubic root of 56660213 is about 384.0838688519.

Adding to 56660213 its reverse (31206665), we get a palindrome (87866878).

The spelling of 56660213 in words is "fifty-six million, six hundred sixty thousand, two hundred thirteen".