212205227 has 8 divisors (see below), whose sum is σ = 228754176. Its totient is φ = 195688512.

The previous prime is 212205221. The next prime is 212205247. The reversal of 212205227 is 722502212.

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 212205227 - 2⁴ = 212205211 is a prime.

It is a super-2 number, since 2×212205227² = 90062116732243058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212205221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6623 + ... + 21639.

It is an arithmetic number, because the mean of its divisors is an integer number (28594272).

Almost surely, 2^212205227 is an apocalyptic number.

212205227 is a deficient number, since it is larger than the sum of its proper divisors (16548949).

212205227 is a wasteful number, since it uses less digits than its factorization.

212205227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16117.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 212205227 is about 14567.2655979082. The cubic root of 212205227 is about 596.4655415182.

Adding to 212205227 its reverse (722502212), we get a palindrome (934707439).

The spelling of 212205227 in words is "two hundred twelve million, two hundred five thousand, two hundred twenty-seven".