212227620 has 96 divisors (see below), whose sum is σ = 655724160. Its totient is φ = 50856960.

The previous prime is 212227619. The next prime is 212227621. The reversal of 212227620 is 26722212.

It is an interprime number because it is at equal distance from previous prime (212227619) and next prime (212227621).

It is not an unprimeable number, because it can be changed into a prime (212227621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56934 + ... + 60546.

It is an arithmetic number, because the mean of its divisors is an integer number (6830460).

Almost surely, 2^212227620 is an apocalyptic number.

212227620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212227620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327862080).

212227620 is an abundant number, since it is smaller than the sum of its proper divisors (443496540).

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

212227620 is a wasteful number, since it uses less digits than its factorization.

212227620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725 (or 3723 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 212227620 is about 14568.0341844739. The cubic root of 212227620 is about 596.4865214964.

Adding to 212227620 its reverse (26722212), we get a palindrome (238949832).

The spelling of 212227620 in words is "two hundred twelve million, two hundred twenty-seven thousand, six hundred twenty".