202313213 has 4 divisors (see below), whose sum is σ = 202344348. Its totient is φ = 202282080.

The previous prime is 202313203. The next prime is 202313219. The reversal of 202313213 is 312313202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312313202 = 2 ⋅156156601.

It can be written as a sum of positive squares in 2 ways, for example, as 183277444 + 19035769 = 13538^2 + 4363^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202313213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202313191 and 202313200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202313219) 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, 1706 + ... + 20187.

It is an arithmetic number, because the mean of its divisors is an integer number (50586087).

Almost surely, 2^202313213 is an apocalyptic number.

It is an amenable number.

202313213 is a deficient number, since it is larger than the sum of its proper divisors (31135).

202313213 is an equidigital number, since it uses as much as digits as its factorization.

202313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31134.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 202313213 is about 14223.6849304250. The cubic root of 202313213 is about 587.0495359698.

Adding to 202313213 its reverse (312313202), we get a palindrome (514626415).

The spelling of 202313213 in words is "two hundred two million, three hundred thirteen thousand, two hundred thirteen".