212343331 has 4 divisors (see below), whose sum is σ = 217281592. Its totient is φ = 207405072.

The previous prime is 212343317. The next prime is 212343347. The reversal of 212343331 is 133343212.

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 212343331 - 2¹⁵ = 212310563 is a prime.

It is a super-2 number, since 2×212343331² = 90179380440351122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212343361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2469066 + ... + 2469151.

It is an arithmetic number, because the mean of its divisors is an integer number (54320398).

Almost surely, 2^212343331 is an apocalyptic number.

212343331 is a deficient number, since it is larger than the sum of its proper divisors (4938261).

212343331 is an equidigital number, since it uses as much as digits as its factorization.

212343331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4938260.

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

The square root of 212343331 is about 14572.0050439190. The cubic root of 212343331 is about 596.5949075019.

Adding to 212343331 its reverse (133343212), we get a palindrome (345686543).

It can be divided in two parts, 2123 and 43331, that added together give a palindrome (45454).

The spelling of 212343331 in words is "two hundred twelve million, three hundred forty-three thousand, three hundred thirty-one".