213103613 has 2 divisors, whose sum is σ = 213103614. Its totient is φ = 213103612.

The previous prime is 213103559. The next prime is 213103643. The reversal of 213103613 is 316301312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206123449 + 6980164 = 14357^2 + 2642^2 .

It is a cyclic number.

It is not a de Polignac number, because 213103613 - 2⁸ = 213103357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213103643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106551806 + 106551807.

It is an arithmetic number, because the mean of its divisors is an integer number (106551807).

Almost surely, 2^213103613 is an apocalyptic number.

It is an amenable number.

213103613 is a deficient number, since it is larger than the sum of its proper divisors (1).

213103613 is an equidigital number, since it uses as much as digits as its factorization.

213103613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 213103613 is about 14598.0688106338. The cubic root of 213103613 is about 597.3060829724.

Adding to 213103613 its reverse (316301312), we get a palindrome (529404925).

The spelling of 213103613 in words is "two hundred thirteen million, one hundred three thousand, six hundred thirteen".