213323220 has 120 divisors (see below), whose sum is σ = 730100448. Its totient is φ = 51710400.

The previous prime is 213323213. The next prime is 213323233. The reversal of 213323220 is 22323312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213323193 and 213323202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11835 + ... + 23805.

Almost surely, 2^213323220 is an apocalyptic number.

213323220 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 213323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365050224).

213323220 is an abundant number, since it is smaller than the sum of its proper divisors (516777228).

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

213323220 is a wasteful number, since it uses less digits than its factorization.

213323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12003 (or 11992 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 213323220 is about 14605.5886564014. The cubic root of 213323220 is about 597.5111906542.

Adding to 213323220 its reverse (22323312), we get a palindrome (235646532).

The spelling of 213323220 in words is "two hundred thirteen million, three hundred twenty-three thousand, two hundred twenty".