213222432 has 48 divisors (see below), whose sum is σ = 592637472. Its totient is φ = 66892800.

The previous prime is 213222407. The next prime is 213222437. The reversal of 213222432 is 234222312.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a junction number, because it is equal to n+sod(n) for n = 213222399 and 213222408.

It is not an unprimeable number, because it can be changed into a prime (213222437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63694 + ... + 66957.

It is an arithmetic number, because the mean of its divisors is an integer number (12346614).

Almost surely, 2^213222432 is an apocalyptic number.

It is an amenable number.

213222432 is an abundant number, since it is smaller than the sum of its proper divisors (379415040).

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

213222432 is a wasteful number, since it uses less digits than its factorization.

213222432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130681 (or 130673 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 213222432 is about 14602.1379256601. The cubic root of 213222432 is about 597.4170745603.

Adding to 213222432 its reverse (234222312), we get a palindrome (447444744).

The spelling of 213222432 in words is "two hundred thirteen million, two hundred twenty-two thousand, four hundred thirty-two".