213181332 has 72 divisors (see below), whose sum is σ = 615617856. Its totient is φ = 56219904.

The previous prime is 213181307. The next prime is 213181361. The reversal of 213181332 is 233181312.

213181332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6688 + ... + 21704.

It is an arithmetic number, because the mean of its divisors is an integer number (8550248).

Almost surely, 2^213181332 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 213181332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307808928).

213181332 is an abundant number, since it is smaller than the sum of its proper divisors (402436524).

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

213181332 is a wasteful number, since it uses less digits than its factorization.

213181332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15057 (or 15042 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 213181332 is about 14600.7305296687. The cubic root of 213181332 is about 597.3786867613.

The spelling of 213181332 in words is "two hundred thirteen million, one hundred eighty-one thousand, three hundred thirty-two".