213432442 has 8 divisors (see below), whose sum is σ = 320253300. Its totient is φ = 106681344.

The previous prime is 213432421. The next prime is 213432449. The reversal of 213432442 is 244234312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 187717401 + 25715041 = 13701^2 + 5071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213432449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8967 + ... + 22522.

Almost surely, 2^213432442 is an apocalyptic number.

213432442 is a deficient number, since it is larger than the sum of its proper divisors (106820858).

213432442 is a wasteful number, since it uses less digits than its factorization.

213432442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34880.

The product of its digits is 4608, while the sum is 25.

The square root of 213432442 is about 14609.3272261251. The cubic root of 213432442 is about 597.6131489759.

Adding to 213432442 its reverse (244234312), we get a palindrome (457666754).

The spelling of 213432442 in words is "two hundred thirteen million, four hundred thirty-two thousand, four hundred forty-two".