211049680 has 40 divisors (see below), whose sum is σ = 493968384. Its totient is φ = 83856000.

The previous prime is 211049669. The next prime is 211049731. The reversal of 211049680 is 86940112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3345 + ... + 20815.

Almost surely, 2^211049680 is an apocalyptic number.

211049680 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 211049680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246984192).

211049680 is an abundant number, since it is smaller than the sum of its proper divisors (282918704).

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

211049680 is a wasteful number, since it uses less digits than its factorization.

211049680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17635 (or 17629 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 211049680 is about 14527.5490018103. The cubic root of 211049680 is about 595.3809015054.

Adding to 211049680 its reverse (86940112), we get a palindrome (297989792).

The spelling of 211049680 in words is "two hundred eleven million, forty-nine thousand, six hundred eighty".