656213 has 8 divisors (see below), whose sum is σ = 693888. Its totient is φ = 619344.

The previous prime is 656171. The next prime is 656221. The reversal of 656213 is 312656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656213 - 2¹² = 652117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2231 + ... + 2507.

It is an arithmetic number, because the mean of its divisors is an integer number (86736).

2⁶⁵⁶²¹³ is an apocalyptic number.

It is an amenable number.

656213 is a deficient number, since it is larger than the sum of its proper divisors (37675).

656213 is a wasteful number, since it uses less digits than its factorization.

656213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403.

The product of its digits is 1080, while the sum is 23.

The square root of 656213 is about 810.0697500833. The cubic root of 656213 is about 86.8990329107.

Adding to 656213 its reverse (312656), we get a palindrome (968869).

The spelling of 656213 in words is "six hundred fifty-six thousand, two hundred thirteen".