213424434 has 24 divisors (see below), whose sum is σ = 473699772. Its totient is φ = 69406080.

The previous prime is 213424411. The next prime is 213424439. The reversal of 213424434 is 434424312.

It is a happy number.

213424434 is a `hidden beast` number, since 213 + 4 + 2 + 443 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 207446409 + 5978025 = 14403^2 + 2445^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213424398 and 213424407.

It is not an unprimeable number, because it can be changed into a prime (213424439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143859 + ... + 145334.

Almost surely, 2^213424434 is an apocalyptic number.

213424434 is an abundant number, since it is smaller than the sum of its proper divisors (260275338).

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

213424434 is a wasteful number, since it uses less digits than its factorization.

213424434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289242 (or 289239 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 213424434 is about 14609.0531520698. The cubic root of 213424434 is about 597.6056747202.

Adding to 213424434 its reverse (434424312), we get a palindrome (647848746).

The spelling of 213424434 in words is "two hundred thirteen million, four hundred twenty-four thousand, four hundred thirty-four".