213540203 has 2 divisors, whose sum is σ = 213540204. Its totient is φ = 213540202.

The previous prime is 213540191. The next prime is 213540251. The reversal of 213540203 is 302045312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213540203 - 2⁸ = 213539947 is a prime.

It is not a weakly prime, because it can be changed into another prime (213540703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106770101 + 106770102.

It is an arithmetic number, because the mean of its divisors is an integer number (106770102).

Almost surely, 2^213540203 is an apocalyptic number.

213540203 is a deficient number, since it is larger than the sum of its proper divisors (1).

213540203 is an equidigital number, since it uses as much as digits as its factorization.

213540203 is an odious number, because the sum of its binary digits is odd.

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

The square root of 213540203 is about 14613.0148497837. The cubic root of 213540203 is about 597.7137093760.

Adding to 213540203 its reverse (302045312), we get a palindrome (515585515).

The spelling of 213540203 in words is "two hundred thirteen million, five hundred forty thousand, two hundred three".