212306233 has 4 divisors (see below), whose sum is σ = 213658660. Its totient is φ = 210953808.

The previous prime is 212306221. The next prime is 212306239. The reversal of 212306233 is 332603212.

212306233 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 can be written as a sum of positive squares in 2 ways, for example, as 156550144 + 55756089 = 12512^2 + 7467^2 .

It is a cyclic number.

It is not a de Polignac number, because 212306233 - 2⁵ = 212306201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212306239) 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, 675978 + ... + 676291.

It is an arithmetic number, because the mean of its divisors is an integer number (53414665).

Almost surely, 2^212306233 is an apocalyptic number.

It is an amenable number.

212306233 is a deficient number, since it is larger than the sum of its proper divisors (1352427).

212306233 is a wasteful number, since it uses less digits than its factorization.

212306233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352426.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 212306233 is about 14570.7320680877. The cubic root of 212306233 is about 596.5601622510.

Adding to 212306233 its reverse (332603212), we get a palindrome (544909445).

The spelling of 212306233 in words is "two hundred twelve million, three hundred six thousand, two hundred thirty-three".