202313 has 4 divisors (see below), whose sum is σ = 203280. Its totient is φ = 201348.

The previous prime is 202309. The next prime is 202327. The reversal of 202313 is 313202.

202313 is nontrivially palindromic in base 13.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 313202 = 2 ⋅156601.

It is a cyclic number.

It is not a de Polignac number, because 202313 - 2² = 202309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202294 and 202303.

It is not an unprimeable number, because it can be changed into a prime (202343) 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, 23 + ... + 636.

It is an arithmetic number, because the mean of its divisors is an integer number (50820).

2²⁰²³¹³ is an apocalyptic number.

It is an amenable number.

202313 is a deficient number, since it is larger than the sum of its proper divisors (967).

202313 is an equidigital number, since it uses as much as digits as its factorization.

202313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 202313 is about 449.7921742316. The cubic root of 202313 is about 58.7049329950.

Adding to 202313 its reverse (313202), we get a palindrome (515515).

Subtracting 202313 from its reverse (313202), we obtain a square (110889 = 333²).

It can be divided in two parts, 202 and 313, that added together give a palindrome (515).

The spelling of 202313 in words is "two hundred two thousand, three hundred thirteen".