212123215 has 8 divisors (see below), whose sum is σ = 254827440. Its totient is φ = 169512192.

The previous prime is 212123203. The next prime is 212123237. The reversal of 212123215 is 512321212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212123215 - 2¹⁵ = 212090447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212123192 and 212123201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18189 + ... + 27478.

It is an arithmetic number, because the mean of its divisors is an integer number (31853430).

Almost surely, 2^212123215 is an apocalyptic number.

212123215 is a deficient number, since it is larger than the sum of its proper divisors (42704225).

212123215 is an equidigital number, since it uses as much as digits as its factorization.

212123215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46601.

The product of its digits is 240, while the sum is 19.

The square root of 212123215 is about 14564.4503844120. The cubic root of 212123215 is about 596.3886919580.

Adding to 212123215 its reverse (512321212), we get a palindrome (724444427).

The spelling of 212123215 in words is "two hundred twelve million, one hundred twenty-three thousand, two hundred fifteen".