213424403 has 4 divisors (see below), whose sum is σ = 215822520. Its totient is φ = 211026288.

The previous prime is 213424381. The next prime is 213424411. The reversal of 213424403 is 304424312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213424403 - 2⁶ = 213424339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213424483) 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 3 ways as a sum of consecutive naturals, for example, 1198925 + ... + 1199102.

It is an arithmetic number, because the mean of its divisors is an integer number (53955630).

Almost surely, 2^213424403 is an apocalyptic number.

213424403 is a deficient number, since it is larger than the sum of its proper divisors (2398117).

213424403 is an equidigital number, since it uses as much as digits as its factorization.

213424403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398116.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 213424403 is about 14609.0520910838. The cubic root of 213424403 is about 597.6056457860.

Adding to 213424403 its reverse (304424312), we get a palindrome (517848715).

Subtracting 213424403 from its reverse (304424312), we obtain a palindrome (90999909).

The spelling of 213424403 in words is "two hundred thirteen million, four hundred twenty-four thousand, four hundred three".