213449423 has 4 divisors (see below), whose sum is σ = 232853928. Its totient is φ = 194044920.

The previous prime is 213449417. The next prime is 213449437. The reversal of 213449423 is 324944312.

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 213449423 - 2¹² = 213445327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213449423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213449443) 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, 9702236 + ... + 9702257.

It is an arithmetic number, because the mean of its divisors is an integer number (58213482).

Almost surely, 2^213449423 is an apocalyptic number.

213449423 is a deficient number, since it is larger than the sum of its proper divisors (19404505).

213449423 is a wasteful number, since it uses less digits than its factorization.

213449423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19404504.

The product of its digits is 20736, while the sum is 32.

The square root of 213449423 is about 14609.9083843808. The cubic root of 213449423 is about 597.6289975502.

The spelling of 213449423 in words is "two hundred thirteen million, four hundred forty-nine thousand, four hundred twenty-three".