202315313 has 4 divisors (see below), whose sum is σ = 204105828. Its totient is φ = 200524800.

The previous prime is 202315303. The next prime is 202315319. The reversal of 202315313 is 313513202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313513202 = 2 ⋅156756601.

It can be written as a sum of positive squares in 2 ways, for example, as 43983424 + 158331889 = 6632^2 + 12583^2 .

It is a cyclic number.

It is not a de Polignac number, because 202315313 - 2¹⁰ = 202314289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202315319) 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, 895088 + ... + 895313.

It is an arithmetic number, because the mean of its divisors is an integer number (51026457).

Almost surely, 2^202315313 is an apocalyptic number.

It is an amenable number.

202315313 is a deficient number, since it is larger than the sum of its proper divisors (1790515).

202315313 is a wasteful number, since it uses less digits than its factorization.

202315313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790514.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 202315313 is about 14223.7587507663. The cubic root of 202315313 is about 587.0515671434.

Adding to 202315313 its reverse (313513202), we get a palindrome (515828515).

The spelling of 202315313 in words is "two hundred two million, three hundred fifteen thousand, three hundred thirteen".