213312232 has 32 divisors (see below), whose sum is σ = 459921600. Its totient is φ = 90854784.

The previous prime is 213312223. The next prime is 213312251. The reversal of 213312232 is 232213312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2557 + ... + 20812.

It is an arithmetic number, because the mean of its divisors is an integer number (14372550).

Almost surely, 2^213312232 is an apocalyptic number.

It is an amenable number.

213312232 is an abundant number, since it is smaller than the sum of its proper divisors (246609368).

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

213312232 is a wasteful number, since it uses less digits than its factorization.

213312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23545 (or 23541 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 213312232 is about 14605.2124941748. The cubic root of 213312232 is about 597.5009314715.

Adding to 213312232 its reverse (232213312), we get a palindrome (445525544).

It can be divided in two parts, 2133 and 12232, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 213312232 in words is "two hundred thirteen million, three hundred twelve thousand, two hundred thirty-two".