213425543 has 4 divisors (see below), whose sum is σ = 217966560. Its totient is φ = 208884528.

The previous prime is 213425521. The next prime is 213425581. The reversal of 213425543 is 345524312.

It is a happy number.

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 213425543 - 2¹² = 213421447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213425143) 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, 2270438 + ... + 2270531.

It is an arithmetic number, because the mean of its divisors is an integer number (54491640).

Almost surely, 2^213425543 is an apocalyptic number.

213425543 is a deficient number, since it is larger than the sum of its proper divisors (4541017).

213425543 is an equidigital number, since it uses as much as digits as its factorization.

213425543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4541016.

The product of its digits is 14400, while the sum is 29.

The square root of 213425543 is about 14609.0911079369. The cubic root of 213425543 is about 597.6067098149.

Adding to 213425543 its reverse (345524312), we get a palindrome (558949855).

The spelling of 213425543 in words is "two hundred thirteen million, four hundred twenty-five thousand, five hundred forty-three".