656322213 has 8 divisors (see below), whose sum is σ = 926572608. Its totient is φ = 411809984.

The previous prime is 656322209. The next prime is 656322239. The reversal of 656322213 is 312223656.

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 656322213 - 2² = 656322209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656326213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6434481 + ... + 6434582.

It is an arithmetic number, because the mean of its divisors is an integer number (115821576).

Almost surely, 2^656322213 is an apocalyptic number.

It is an amenable number.

656322213 is a deficient number, since it is larger than the sum of its proper divisors (270250395).

656322213 is a wasteful number, since it uses less digits than its factorization.

656322213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12869083.

The product of its digits is 12960, while the sum is 30.

The square root of 656322213 is about 25618.7863295668. The cubic root of 656322213 is about 869.0385348858.

Adding to 656322213 its reverse (312223656), we get a palindrome (968545869).

The spelling of 656322213 in words is "six hundred fifty-six million, three hundred twenty-two thousand, two hundred thirteen".