215966212 has 48 divisors (see below), whose sum is σ = 486420480. Its totient is φ = 81424800.

The previous prime is 215966209. The next prime is 215966213. The reversal of 215966212 is 212669512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (215966213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1762 + ... + 20857.

It is an arithmetic number, because the mean of its divisors is an integer number (10133760).

Almost surely, 2^215966212 is an apocalyptic number.

215966212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

215966212 is an abundant number, since it is smaller than the sum of its proper divisors (270454268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215966212 is a wasteful number, since it uses less digits than its factorization.

215966212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22672 (or 22670 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 215966212 is about 14695.7889206398. The cubic root of 215966212 is about 599.9687131834.

The spelling of 215966212 in words is "two hundred fifteen million, nine hundred sixty-six thousand, two hundred twelve".