212143432 has 16 divisors (see below), whose sum is σ = 398040300. Its totient is φ = 105999360.

The previous prime is 212143429. The next prime is 212143433. The reversal of 212143432 is 234341212.

It can be written as a sum of positive squares in 2 ways, for example, as 197290116 + 14853316 = 14046^2 + 3854^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212143433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4632 + ... + 21112.

Almost surely, 2^212143432 is an apocalyptic number.

It is an amenable number.

212143432 is a deficient number, since it is larger than the sum of its proper divisors (185896868).

212143432 is a wasteful number, since it uses less digits than its factorization.

212143432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18096 (or 18092 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 212143432 is about 14565.1444208425. The cubic root of 212143432 is about 596.4076381904.

Adding to 212143432 its reverse (234341212), we get a palindrome (446484644).

The spelling of 212143432 in words is "two hundred twelve million, one hundred forty-three thousand, four hundred thirty-two".