211228000 has 48 divisors (see below), whose sum is σ = 518997024. Its totient is φ = 84489600.

The previous prime is 211227979. The next prime is 211228001. The reversal of 211228000 is 822112.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211228001) 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, 22404 + ... + 30403.

It is an arithmetic number, because the mean of its divisors is an integer number (10812438).

Almost surely, 2^211228000 is an apocalyptic number.

211228000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211228000 is an abundant number, since it is smaller than the sum of its proper divisors (307769024).

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

211228000 is an equidigital number, since it uses as much as digits as its factorization.

211228000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52832 (or 52814 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 211228000 is about 14533.6850110356. The cubic root of 211228000 is about 595.5485372885.

The spelling of 211228000 in words is "two hundred eleven million, two hundred twenty-eight thousand".