213111263 has 2 divisors, whose sum is σ = 213111264. Its totient is φ = 213111262.

The previous prime is 213111259. The next prime is 213111271. The reversal of 213111263 is 362111312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213111263 - 2² = 213111259 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 (213111203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106555631 + 106555632.

It is an arithmetic number, because the mean of its divisors is an integer number (106555632).

Almost surely, 2^213111263 is an apocalyptic number.

213111263 is a deficient number, since it is larger than the sum of its proper divisors (1).

213111263 is an equidigital number, since it uses as much as digits as its factorization.

213111263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 213111263 is about 14598.3308292421. The cubic root of 213111263 is about 597.3132302575.

Adding to 213111263 its reverse (362111312), we get a palindrome (575222575).

The spelling of 213111263 in words is "two hundred thirteen million, one hundred eleven thousand, two hundred sixty-three".