213242423 has 8 divisors (see below), whose sum is σ = 221000400. Its totient is φ = 205511488.

The previous prime is 213242401. The next prime is 213242429. The reversal of 213242423 is 324242312.

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 213242423 - 2¹⁸ = 212980279 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 (213242429) 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, 10040 + ... + 22962.

It is an arithmetic number, because the mean of its divisors is an integer number (27625050).

Almost surely, 2^213242423 is an apocalyptic number.

213242423 is a deficient number, since it is larger than the sum of its proper divisors (7757977).

213242423 is a wasteful number, since it uses less digits than its factorization.

213242423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13521.

The product of its digits is 2304, while the sum is 23.

The square root of 213242423 is about 14602.8224326669. The cubic root of 213242423 is about 597.4357445651.

Adding to 213242423 its reverse (324242312), we get a palindrome (537484735).

The spelling of 213242423 in words is "two hundred thirteen million, two hundred forty-two thousand, four hundred twenty-three".