213443423 has 4 divisors (see below), whose sum is σ = 213539040. Its totient is φ = 213347808.

The previous prime is 213443413. The next prime is 213443431. The reversal of 213443423 is 324344312.

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 213443423 - 2⁴ = 213443407 is a prime.

It is a super-4 number, since 4×213443423⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213443392 and 213443401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213443413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44378 + ... + 48951.

It is an arithmetic number, because the mean of its divisors is an integer number (53384760).

Almost surely, 2^213443423 is an apocalyptic number.

213443423 is a deficient number, since it is larger than the sum of its proper divisors (95617).

213443423 is an equidigital number, since it uses as much as digits as its factorization.

213443423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95616.

The product of its digits is 6912, while the sum is 26.

The square root of 213443423 is about 14609.7030428411. The cubic root of 213443423 is about 597.6233977731.

Adding to 213443423 its reverse (324344312), we get a palindrome (537787735).

The spelling of 213443423 in words is "two hundred thirteen million, four hundred forty-three thousand, four hundred twenty-three".