212432423 has 4 divisors (see below), whose sum is σ = 242779920. Its totient is φ = 182084928.

The previous prime is 212432419. The next prime is 212432443. The reversal of 212432423 is 324234212.

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 212432423 - 2² = 212432419 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 (212432413) 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, 15173738 + ... + 15173751.

It is an arithmetic number, because the mean of its divisors is an integer number (60694980).

Almost surely, 2^212432423 is an apocalyptic number.

212432423 is a deficient number, since it is larger than the sum of its proper divisors (30347497).

212432423 is an equidigital number, since it uses as much as digits as its factorization.

212432423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30347496.

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

The square root of 212432423 is about 14575.0616808300. The cubic root of 212432423 is about 596.6783327758.

Adding to 212432423 its reverse (324234212), we get a palindrome (536666635).

The spelling of 212432423 in words is "two hundred twelve million, four hundred thirty-two thousand, four hundred twenty-three".