213331312 has 20 divisors (see below), whose sum is σ = 417124840. Its totient is φ = 105686208.

The previous prime is 213331289. The next prime is 213331361. The reversal of 213331312 is 213133312.

It is a self number, because there is not a number n which added to its sum of digits gives 213331312.

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, 59418 + ... + 62905.

It is an arithmetic number, because the mean of its divisors is an integer number (20856242).

Almost surely, 2^213331312 is an apocalyptic number.

It is an amenable number.

213331312 is a deficient number, since it is larger than the sum of its proper divisors (203793528).

213331312 is a wasteful number, since it uses less digits than its factorization.

213331312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122440 (or 122434 counting only the distinct ones).

The product of its digits is 324, while the sum is 19.

The square root of 213331312 is about 14605.8656710241. The cubic root of 213331312 is about 597.5187456990.

Adding to 213331312 its reverse (213133312), we get a palindrome (426464624).

It can be divided in two parts, 21 and 3331312, that added together give a palindrome (3331333).

The spelling of 213331312 in words is "two hundred thirteen million, three hundred thirty-one thousand, three hundred twelve".