213434111 has 4 divisors (see below), whose sum is σ = 232837224. Its totient is φ = 194031000.

The previous prime is 213434071. The next prime is 213434119. The reversal of 213434111 is 111434312.

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 213434111 - 2¹⁴ = 213417727 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 (213434119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9701540 + ... + 9701561.

It is an arithmetic number, because the mean of its divisors is an integer number (58209306).

Almost surely, 2^213434111 is an apocalyptic number.

213434111 is a deficient number, since it is larger than the sum of its proper divisors (19403113).

213434111 is a wasteful number, since it uses less digits than its factorization.

213434111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19403112.

The product of its digits is 288, while the sum is 20.

The square root of 213434111 is about 14609.3843470558. The cubic root of 213434111 is about 597.6147067112.

Adding to 213434111 its reverse (111434312), we get a palindrome (324868423).

The spelling of 213434111 in words is "two hundred thirteen million, four hundred thirty-four thousand, one hundred eleven".