213223472 has 80 divisors (see below), whose sum is σ = 542227200. Its totient is φ = 78693120.

The previous prime is 213223459. The next prime is 213223481. The reversal of 213223472 is 274322312.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18854 + ... + 27962.

It is an arithmetic number, because the mean of its divisors is an integer number (6777840).

Almost surely, 2^213223472 is an apocalyptic number.

213223472 is a gapful number since it is divisible by the number (22) 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 213223472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271113600).

213223472 is an abundant number, since it is smaller than the sum of its proper divisors (329003728).

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

213223472 is a wasteful number, since it uses less digits than its factorization.

213223472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9154 (or 9148 counting only the distinct ones).

The product of its digits is 4032, while the sum is 26.

The square root of 213223472 is about 14602.1735368403. The cubic root of 213223472 is about 597.4180458664.

Adding to 213223472 its reverse (274322312), we get a palindrome (487545784).

The spelling of 213223472 in words is "two hundred thirteen million, two hundred twenty-three thousand, four hundred seventy-two".