212215423 has 6 divisors (see below), whose sum is σ = 246862896. Its totient is φ = 181898892.

The previous prime is 212215361. The next prime is 212215433. The reversal of 212215423 is 324512212.

It is a happy number.

It is not a de Polignac number, because 212215423 - 2¹³ = 212207231 is a prime.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 212215394 and 212215403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212215433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2165415 + ... + 2165512.

It is an arithmetic number, because the mean of its divisors is an integer number (41143816).

Almost surely, 2^212215423 is an apocalyptic number.

212215423 is a deficient number, since it is larger than the sum of its proper divisors (34647473).

212215423 is an equidigital number, since it uses as much as digits as its factorization.

212215423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330941 (or 4330934 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 212215423 is about 14567.6155564320. The cubic root of 212215423 is about 596.4750943229.

Adding to 212215423 its reverse (324512212), we get a palindrome (536727635).

The spelling of 212215423 in words is "two hundred twelve million, two hundred fifteen thousand, four hundred twenty-three".