213243263 has 2 divisors, whose sum is σ = 213243264. Its totient is φ = 213243262.

The previous prime is 213243259. The next prime is 213243271. The reversal of 213243263 is 362342312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213243263 - 2² = 213243259 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213243463) 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, 106621631 + 106621632.

It is an arithmetic number, because the mean of its divisors is an integer number (106621632).

Almost surely, 2^213243263 is an apocalyptic number.

213243263 is a deficient number, since it is larger than the sum of its proper divisors (1).

213243263 is an equidigital number, since it uses as much as digits as its factorization.

213243263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 26.

The square root of 213243263 is about 14602.8511942018. The cubic root of 213243263 is about 597.4365290328.

Adding to 213243263 its reverse (362342312), we get a palindrome (575585575).

The spelling of 213243263 in words is "two hundred thirteen million, two hundred forty-three thousand, two hundred sixty-three".