202540213 has 2 divisors, whose sum is σ = 202540214. Its totient is φ = 202540212.

The previous prime is 202540201. The next prime is 202540259. The reversal of 202540213 is 312045202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111471364 + 91068849 = 10558^2 + 9543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202540213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202540913) 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 as a sum of consecutive naturals, namely, 101270106 + 101270107.

It is an arithmetic number, because the mean of its divisors is an integer number (101270107).

Almost surely, 2^202540213 is an apocalyptic number.

It is an amenable number.

202540213 is a deficient number, since it is larger than the sum of its proper divisors (1).

202540213 is an equidigital number, since it uses as much as digits as its factorization.

202540213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 202540213 is about 14231.6623414132. The cubic root of 202540213 is about 587.2690148550.

Adding to 202540213 its reverse (312045202), we get a palindrome (514585415).

The spelling of 202540213 in words is "two hundred two million, five hundred forty thousand, two hundred thirteen".