212215233 has 16 divisors (see below), whose sum is σ = 305254656. Its totient is φ = 130640640.

The previous prime is 212215207. The next prime is 212215247. The reversal of 212215233 is 332512212.

It is not a de Polignac number, because 212215233 - 2⁶ = 212215169 is a prime.

It is a super-3 number, since 3×212215233³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (212215253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36553 + ... + 41958.

It is an arithmetic number, because the mean of its divisors is an integer number (19078416).

Almost surely, 2^212215233 is an apocalyptic number.

It is an amenable number.

212215233 is a deficient number, since it is larger than the sum of its proper divisors (93039423).

212215233 is a wasteful number, since it uses less digits than its factorization.

212215233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78584.

The product of its digits is 720, while the sum is 21.

The square root of 212215233 is about 14567.6090351162. The cubic root of 212215233 is about 596.4749163115.

Adding to 212215233 its reverse (332512212), we get a palindrome (544727445).

The spelling of 212215233 in words is "two hundred twelve million, two hundred fifteen thousand, two hundred thirty-three".