213442332 has 12 divisors (see below), whose sum is σ = 498032136. Its totient is φ = 71147440.

The previous prime is 213442319. The next prime is 213442343. The reversal of 213442332 is 233244312.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

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, 8893419 + ... + 8893442.

It is an arithmetic number, because the mean of its divisors is an integer number (41502678).

Almost surely, 2^213442332 is an apocalyptic number.

It is an amenable number.

213442332 is an abundant number, since it is smaller than the sum of its proper divisors (284589804).

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

213442332 is a wasteful number, since it uses less digits than its factorization.

213442332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17786868 (or 17786866 counting only the distinct ones).

The product of its digits is 3456, while the sum is 24.

The square root of 213442332 is about 14609.6657045943. The cubic root of 213442332 is about 597.6223795357.

Adding to 213442332 its reverse (233244312), we get a palindrome (446686644).

The spelling of 213442332 in words is "two hundred thirteen million, four hundred forty-two thousand, three hundred thirty-two".