213443340 has 96 divisors (see below), whose sum is σ = 686327040. Its totient is φ = 49017600.

The previous prime is 213443323. The next prime is 213443341. The reversal of 213443340 is 43344312.

It is a self number, because there is not a number n which added to its sum of digits gives 213443340.

It is not an unprimeable number, because it can be changed into a prime (213443341) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4030 + ... + 21050.

It is an arithmetic number, because the mean of its divisors is an integer number (7149240).

Almost surely, 2^213443340 is an apocalyptic number.

213443340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213443340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343163520).

213443340 is an abundant number, since it is smaller than the sum of its proper divisors (472883700).

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

213443340 is a wasteful number, since it uses less digits than its factorization.

213443340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17063 (or 17061 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 213443340 is about 14609.7002022629. The cubic root of 213443340 is about 597.6233203088.

Adding to 213443340 its reverse (43344312), we get a palindrome (256787652).

The spelling of 213443340 in words is "two hundred thirteen million, four hundred forty-three thousand, three hundred forty".