213232220 has 12 divisors (see below), whose sum is σ = 447787704. Its totient is φ = 85292880.

The previous prime is 213232213. The next prime is 213232249. The reversal of 213232220 is 22232312.

It is a super-2 number, since 2×213232220² = 90935959292256800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5330786 + ... + 5330825.

It is an arithmetic number, because the mean of its divisors is an integer number (37315642).

Almost surely, 2^213232220 is an apocalyptic number.

213232220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213232220 is an abundant number, since it is smaller than the sum of its proper divisors (234555484).

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

213232220 is a wasteful number, since it uses less digits than its factorization.

213232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10661620 (or 10661618 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 213232220 is about 14602.4730782152. The cubic root of 213232220 is about 597.4262159200.

Adding to 213232220 its reverse (22232312), we get a palindrome (235464532).

The spelling of 213232220 in words is "two hundred thirteen million, two hundred thirty-two thousand, two hundred twenty".