213113311 has 4 divisors (see below), whose sum is σ = 213172000. Its totient is φ = 213054624.

The previous prime is 213113297. The next prime is 213113317. The reversal of 213113311 is 113311312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213113311 - 2¹¹ = 213111263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213113317) 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 in 3 ways as a sum of consecutive naturals, for example, 23511 + ... + 31288.

It is an arithmetic number, because the mean of its divisors is an integer number (53293000).

Almost surely, 2^213113311 is an apocalyptic number.

213113311 is a deficient number, since it is larger than the sum of its proper divisors (58689).

213113311 is an equidigital number, since it uses as much as digits as its factorization.

213113311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58688.

The product of its digits is 54, while the sum is 16.

The square root of 213113311 is about 14598.4009740793. The cubic root of 213113311 is about 597.3151436455.

Adding to 213113311 its reverse (113311312), we get a palindrome (326424623).

The spelling of 213113311 in words is "two hundred thirteen million, one hundred thirteen thousand, three hundred eleven".