211440132 has 108 divisors (see below), whose sum is σ = 588944720. Its totient is φ = 66146544.

The previous prime is 211440109. The next prime is 211440133. The reversal of 211440132 is 231044112.

211440132 is a `hidden beast` number, since 211 + 440 + 13 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (211440133) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1976023 + ... + 1976129.

Almost surely, 2^211440132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211440132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294472360).

211440132 is an abundant number, since it is smaller than the sum of its proper divisors (377504588).

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

211440132 is a wasteful number, since it uses less digits than its factorization.

211440132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 211440132 is about 14540.9811223315. The cubic root of 211440132 is about 595.7478363619.

Adding to 211440132 its reverse (231044112), we get a palindrome (442484244).

The spelling of 211440132 in words is "two hundred eleven million, four hundred forty thousand, one hundred thirty-two".