212042423 has 4 divisors (see below), whose sum is σ = 215029008. Its totient is φ = 209055840.

The previous prime is 212042419. The next prime is 212042437. The reversal of 212042423 is 324240212.

212042423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212042423 - 2² = 212042419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212042395 and 212042404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212042023) 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, 1493186 + ... + 1493327.

It is an arithmetic number, because the mean of its divisors is an integer number (53757252).

Almost surely, 2^212042423 is an apocalyptic number.

212042423 is a deficient number, since it is larger than the sum of its proper divisors (2986585).

212042423 is an equidigital number, since it uses as much as digits as its factorization.

212042423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986584.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 212042423 is about 14561.6765174893. The cubic root of 212042423 is about 596.3129662314.

Adding to 212042423 its reverse (324240212), we get a palindrome (536282635).

The spelling of 212042423 in words is "two hundred twelve million, forty-two thousand, four hundred twenty-three".