213424123 has 4 divisors (see below), whose sum is σ = 232826328. Its totient is φ = 194021920.

The previous prime is 213424097. The next prime is 213424129. The reversal of 213424123 is 321424312.

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 213424123 - 2⁵ = 213424091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213424094 and 213424103.

It is not an unprimeable number, because it can be changed into a prime (213424129) 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, 9701086 + ... + 9701107.

It is an arithmetic number, because the mean of its divisors is an integer number (58206582).

Almost surely, 2^213424123 is an apocalyptic number.

213424123 is a deficient number, since it is larger than the sum of its proper divisors (19402205).

213424123 is a wasteful number, since it uses less digits than its factorization.

213424123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19402204.

The product of its digits is 1152, while the sum is 22.

The square root of 213424123 is about 14609.0425079811. The cubic root of 213424123 is about 597.6053844450.

Adding to 213424123 its reverse (321424312), we get a palindrome (534848435).

The spelling of 213424123 in words is "two hundred thirteen million, four hundred twenty-four thousand, one hundred twenty-three".