213212423 has 8 divisors (see below), whose sum is σ = 218979600. Its totient is φ = 207472320.

The previous prime is 213212411. The next prime is 213212429. The reversal of 213212423 is 324212312.

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 213212423 - 2¹² = 213208327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213212395 and 213212404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213212429) 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, 9728 + ... + 22826.

It is an arithmetic number, because the mean of its divisors is an integer number (27372450).

Almost surely, 2^213212423 is an apocalyptic number.

213212423 is a deficient number, since it is larger than the sum of its proper divisors (5767177).

213212423 is a wasteful number, since it uses less digits than its factorization.

213212423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13537.

The product of its digits is 576, while the sum is 20.

The square root of 213212423 is about 14601.7951978515. The cubic root of 213212423 is about 597.4077265115.

Adding to 213212423 its reverse (324212312), we get a palindrome (537424735).

The spelling of 213212423 in words is "two hundred thirteen million, two hundred twelve thousand, four hundred twenty-three".