212257215 has 12 divisors (see below), whose sum is σ = 367912584. Its totient is φ = 113203824.

The previous prime is 212257169. The next prime is 212257219. The reversal of 212257215 is 512752212.

It is not a de Polignac number, because 212257215 - 2¹¹ = 212255167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212257219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2358369 + ... + 2358458.

It is an arithmetic number, because the mean of its divisors is an integer number (30659382).

Almost surely, 2^212257215 is an apocalyptic number.

212257215 is a deficient number, since it is larger than the sum of its proper divisors (155655369).

212257215 is a wasteful number, since it uses less digits than its factorization.

212257215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716838 (or 4716835 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 212257215 is about 14569.0499003882. The cubic root of 212257215 is about 596.5142467568.

The spelling of 212257215 in words is "two hundred twelve million, two hundred fifty-seven thousand, two hundred fifteen".