212712433 has 4 divisors (see below), whose sum is σ = 213438708. Its totient is φ = 211986160.

The previous prime is 212712413. The next prime is 212712481. The reversal of 212712433 is 334217212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 205406224 + 7306209 = 14332^2 + 2703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212712433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212712398 and 212712407.

It is not an unprimeable number, because it can be changed into a prime (212712413) 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, 362698 + ... + 363283.

It is an arithmetic number, because the mean of its divisors is an integer number (53359677).

Almost surely, 2^212712433 is an apocalyptic number.

It is an amenable number.

212712433 is a deficient number, since it is larger than the sum of its proper divisors (726275).

212712433 is an equidigital number, since it uses as much as digits as its factorization.

212712433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726274.

The product of its digits is 2016, while the sum is 25.

The square root of 212712433 is about 14584.6643087868. The cubic root of 212712433 is about 596.9403808866.

Adding to 212712433 its reverse (334217212), we get a palindrome (546929645).

The spelling of 212712433 in words is "two hundred twelve million, seven hundred twelve thousand, four hundred thirty-three".