203540213 has 2 divisors, whose sum is σ = 203540214. Its totient is φ = 203540212.

The previous prime is 203540159. The next prime is 203540237. The reversal of 203540213 is 312045302.

It is a happy number.

203540213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200307409 + 3232804 = 14153^2 + 1798^2 .

It is a cyclic number.

It is not a de Polignac number, because 203540213 - 2⁸ = 203539957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203540263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101770106 + 101770107.

It is an arithmetic number, because the mean of its divisors is an integer number (101770107).

Almost surely, 2^203540213 is an apocalyptic number.

It is an amenable number.

203540213 is a deficient number, since it is larger than the sum of its proper divisors (1).

203540213 is an equidigital number, since it uses as much as digits as its factorization.

203540213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 203540213 is about 14266.7520129846. The cubic root of 203540213 is about 588.2339345986.

Adding to 203540213 its reverse (312045302), we get a palindrome (515585515).

The spelling of 203540213 in words is "two hundred three million, five hundred forty thousand, two hundred thirteen".