313213 has 4 divisors (see below), whose sum is σ = 316540. Its totient is φ = 309888.
The previous prime is 313211. The next prime is 313219. The reversal of 313213 is 312313.
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 116964 + 196249 = 342^2 + 443^2 .
It is a cyclic number.
It is not a de Polignac number, because 313213 - 21 = 313211 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 313193 and 313202.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (313211) 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, 1518 + ... + 1711.
It is an arithmetic number, because the mean of its divisors is an integer number (79135).
2313213 is an apocalyptic number.
It is an amenable number.
313213 is a deficient number, since it is larger than the sum of its proper divisors (3327).
313213 is an equidigital number, since it uses as much as digits as its factorization.
313213 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3326.
The product of its digits is 54, while the sum is 13.
The square root of 313213 is about 559.6543576173. The cubic root of 313213 is about 67.9120113403.
Adding to 313213 its reverse (312313), we get a palindrome (625526).
Subtracting from 313213 its reverse (312313), we obtain a square (900 = 302).
The spelling of 313213 in words is "three hundred thirteen thousand, two hundred thirteen".
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