212420215 has 64 divisors (see below), whose sum is σ = 320348160. Its totient is φ = 132088320.

The previous prime is 212420207. The next prime is 212420231. The reversal of 212420215 is 512024212.

It is not a de Polignac number, because 212420215 - 2³ = 212420207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212420192 and 212420201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1352917 + ... + 1353073.

It is an arithmetic number, because the mean of its divisors is an integer number (5005440).

Almost surely, 2^212420215 is an apocalyptic number.

212420215 is a deficient number, since it is larger than the sum of its proper divisors (107927945).

212420215 is a wasteful number, since it uses less digits than its factorization.

212420215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 212420215 is about 14574.6428772715. The cubic root of 212420215 is about 596.6669026489. Note that the first 3 decimals are identical.

Adding to 212420215 its reverse (512024212), we get a palindrome (724444427).

The spelling of 212420215 in words is "two hundred twelve million, four hundred twenty thousand, two hundred fifteen".