213332220 has 36 divisors (see below), whose sum is σ = 647108280. Its totient is φ = 56888544.

The previous prime is 213332191. The next prime is 213332227. The reversal of 213332220 is 22233312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 213332193 and 213332202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213332227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 592410 + ... + 592769.

It is an arithmetic number, because the mean of its divisors is an integer number (17975230).

Almost surely, 2^213332220 is an apocalyptic number.

213332220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213332220 is an abundant number, since it is smaller than the sum of its proper divisors (433776060).

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

213332220 is a wasteful number, since it uses less digits than its factorization.

213332220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185194 (or 1185189 counting only the distinct ones).

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

The square root of 213332220 is about 14605.8967543934. The cubic root of 213332220 is about 597.5195934355.

Adding to 213332220 its reverse (22233312), we get a palindrome (235565532).

The spelling of 213332220 in words is "two hundred thirteen million, three hundred thirty-two thousand, two hundred twenty".