213443334 has 48 divisors (see below), whose sum is σ = 499323552. Its totient is φ = 65505024.

The previous prime is 213443323. The next prime is 213443341. The reversal of 213443334 is 433344312.

213443334 = 4046² + 4047² + ... + 4058².

213443334 is a `hidden beast` number, since 213 + 443 + 3 + 3 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 213443298 and 213443307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113022 + ... + 114894.

It is an arithmetic number, because the mean of its divisors is an integer number (10402574).

Almost surely, 2^213443334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213443334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249661776).

213443334 is an abundant number, since it is smaller than the sum of its proper divisors (285880218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213443334 is a wasteful number, since it uses less digits than its factorization.

213443334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381 (or 2378 counting only the distinct ones).

The product of its digits is 10368, while the sum is 27.

The square root of 213443334 is about 14609.6999969199. The cubic root of 213443334 is about 597.6233147090.

Adding to 213443334 its reverse (433344312), we get a palindrome (646787646).

The spelling of 213443334 in words is "two hundred thirteen million, four hundred forty-three thousand, three hundred thirty-four".