211231332 has 72 divisors (see below), whose sum is σ = 576785664. Its totient is φ = 64794816.

The previous prime is 211231327. The next prime is 211231337. The reversal of 211231332 is 233132112.

It is an interprime number because it is at equal distance from previous prime (211231327) and next prime (211231337).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (211231337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244333 + ... + 245195.

It is an arithmetic number, because the mean of its divisors is an integer number (8010912).

Almost surely, 2^211231332 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 211231332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288392832).

211231332 is an abundant number, since it is smaller than the sum of its proper divisors (365554332).

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

211231332 is a wasteful number, since it uses less digits than its factorization.

211231332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409 (or 1404 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 211231332 is about 14533.7996408372. The cubic root of 211231332 is about 595.5516687504.

Adding to 211231332 its reverse (233132112), we get a palindrome (444363444).

The spelling of 211231332 in words is "two hundred eleven million, two hundred thirty-one thousand, three hundred thirty-two".