211551132 has 48 divisors (see below), whose sum is σ = 534192512. Its totient is φ = 64774080.

The previous prime is 211551121. The next prime is 211551133. The reversal of 211551132 is 231155112.

211551132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211551099 and 211551108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211551133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29703 + ... + 36129.

Almost surely, 2^211551132 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 211551132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267096256).

211551132 is an abundant number, since it is smaller than the sum of its proper divisors (322641380).

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

211551132 is a wasteful number, since it uses less digits than its factorization.

211551132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6658 (or 6656 counting only the distinct ones).

The product of its digits is 300, while the sum is 21.

The square root of 211551132 is about 14544.7974203837. The cubic root of 211551132 is about 595.8520682956.

The spelling of 211551132 in words is "two hundred eleven million, five hundred fifty-one thousand, one hundred thirty-two".