211000000 has 98 divisors (see below), whose sum is σ = 525852644. Its totient is φ = 84000000.

The previous prime is 210999983. The next prime is 211000007. The reversal of 211000000 is 112.

211000000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (211000007) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 999895 + ... + 1000105.

Almost surely, 2^211000000 is an apocalyptic number.

211000000 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 211000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262926322).

211000000 is an abundant number, since it is smaller than the sum of its proper divisors (314852644).

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

211000000 is an frugal number, since it uses more digits than its factorization.

211000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

The square root of 211000000 is about 14525.8390463340. The cubic root of 211000000 is about 595.3341813139.

Adding to 211000000 its reverse (112), we get a palindrome (211000112).

The spelling of 211000000 in words is "two hundred eleven million", and thus it is an aban number.