213231332 has 12 divisors (see below), whose sum is σ = 374070060. Its totient is φ = 106354176.

The previous prime is 213231197. The next prime is 213231353. The reversal of 213231332 is 233132312.

It can be written as a sum of positive squares in 2 ways, for example, as 207821056 + 5410276 = 14416^2 + 2326^2 .

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, 63533 + ... + 66804.

It is an arithmetic number, because the mean of its divisors is an integer number (31172505).

Almost surely, 2^213231332 is an apocalyptic number.

It is an amenable number.

213231332 is a deficient number, since it is larger than the sum of its proper divisors (160838728).

213231332 is a wasteful number, since it uses less digits than its factorization.

213231332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130750 (or 130748 counting only the distinct ones).

The product of its digits is 648, while the sum is 20.

The square root of 213231332 is about 14602.4426723751. The cubic root of 213231332 is about 597.4253865969.

Adding to 213231332 its reverse (233132312), we get a palindrome (446363644).

The spelling of 213231332 in words is "two hundred thirteen million, two hundred thirty-one thousand, three hundred thirty-two".