213443123 has 8 divisors (see below), whose sum is σ = 215832000. Its totient is φ = 211066560.

The previous prime is 213443107. The next prime is 213443149. The reversal of 213443123 is 321344312.

213443123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213443123 - 2⁴ = 213443107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213443183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34253 + ... + 40001.

It is an arithmetic number, because the mean of its divisors is an integer number (26979000).

Almost surely, 2^213443123 is an apocalyptic number.

213443123 is a deficient number, since it is larger than the sum of its proper divisors (2388877).

213443123 is a wasteful number, since it uses less digits than its factorization.

213443123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157.

The product of its digits is 1728, while the sum is 23.

The square root of 213443123 is about 14609.6927756883. The cubic root of 213443123 is about 597.6231177815.

Adding to 213443123 its reverse (321344312), we get a palindrome (534787435).

The spelling of 213443123 in words is "two hundred thirteen million, four hundred forty-three thousand, one hundred twenty-three".