213220332 has 36 divisors (see below), whose sum is σ = 580434400. Its totient is φ = 65606112.

The previous prime is 213220321. The next prime is 213220339. The reversal of 213220332 is 233022312.

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 not an unprimeable number, because it can be changed into a prime (213220339) 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, 227332 + ... + 228267.

Almost surely, 2^213220332 is an apocalyptic number.

It is an amenable number.

213220332 is an abundant number, since it is smaller than the sum of its proper divisors (367214068).

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

213220332 is a wasteful number, since it uses less digits than its factorization.

213220332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455622 (or 455617 counting only the distinct ones).

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

The square root of 213220332 is about 14602.0660182044. The cubic root of 213220332 is about 597.4151132595.

Adding to 213220332 its reverse (233022312), we get a palindrome (446242644).

The spelling of 213220332 in words is "two hundred thirteen million, two hundred twenty thousand, three hundred thirty-two".