212312346 has 32 divisors (see below), whose sum is σ = 448261440. Its totient is φ = 66852864.

The previous prime is 212312341. The next prime is 212312357. The reversal of 212312346 is 643213212.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212312341) 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 15 ways as a sum of consecutive naturals, for example, 40026 + ... + 45018.

It is an arithmetic number, because the mean of its divisors is an integer number (14008170).

Almost surely, 2^212312346 is an apocalyptic number.

212312346 is an abundant number, since it is smaller than the sum of its proper divisors (235949094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212312346 is a wasteful number, since it uses less digits than its factorization.

212312346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390.

The product of its digits is 1728, while the sum is 24.

The square root of 212312346 is about 14570.9418364085. The cubic root of 212312346 is about 596.5658878441.

Adding to 212312346 its reverse (643213212), we get a palindrome (855525558).

The spelling of 212312346 in words is "two hundred twelve million, three hundred twelve thousand, three hundred forty-six".