212346427 has 4 divisors (see below), whose sum is σ = 217284760. Its totient is φ = 207408096.

The previous prime is 212346401. The next prime is 212346467. The reversal of 212346427 is 724643212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212346427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212346467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2469102 + ... + 2469187.

It is an arithmetic number, because the mean of its divisors is an integer number (54321190).

Almost surely, 2^212346427 is an apocalyptic number.

212346427 is a deficient number, since it is larger than the sum of its proper divisors (4938333).

212346427 is an equidigital number, since it uses as much as digits as its factorization.

212346427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938332.

The product of its digits is 16128, while the sum is 31.

The square root of 212346427 is about 14572.1112746232. Note that the first 3 decimals coincide. The cubic root of 212346427 is about 596.5978069711.

Adding to 212346427 its reverse (724643212), we get a palindrome (936989639).

The spelling of 212346427 in words is "two hundred twelve million, three hundred forty-six thousand, four hundred twenty-seven".