315213 has 4 divisors (see below), whose sum is σ = 420288. Its totient is φ = 210140.

The previous prime is 315199. The next prime is 315223. The reversal of 315213 is 312513.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315213 - 2⁵ = 315181 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 315192 and 315201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52533 + ... + 52538.

It is an arithmetic number, because the mean of its divisors is an integer number (105072).

2³¹⁵²¹³ is an apocalyptic number.

It is an amenable number.

315213 is a deficient number, since it is larger than the sum of its proper divisors (105075).

315213 is a wasteful number, since it uses less digits than its factorization.

315213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105074.

The product of its digits is 90, while the sum is 15.

The square root of 315213 is about 561.4383314310. The cubic root of 315213 is about 68.0562539117.

Adding to 315213 its reverse (312513), we get a palindrome (627726).

It can be divided in two parts, 315 and 213, that added together give a triangular number (528 = T₃₂).

The spelling of 315213 in words is "three hundred fifteen thousand, two hundred thirteen".