213231330 has 96 divisors (see below), whose sum is σ = 616412160. Its totient is φ = 50785920.

The previous prime is 213231197. The next prime is 213231353. The reversal of 213231330 is 33132312.

213231330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33331 + ... + 39209.

It is an arithmetic number, because the mean of its divisors is an integer number (6420960).

Almost surely, 2^213231330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213231330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308206080).

213231330 is an abundant number, since it is smaller than the sum of its proper divisors (403180830).

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

213231330 is a wasteful number, since it uses less digits than its factorization.

213231330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5936 (or 5933 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 213231330 is about 14602.4426038934. The cubic root of 213231330 is about 597.4253847291.

Adding to 213231330 its reverse (33132312), we get a palindrome (246363642).

The spelling of 213231330 in words is "two hundred thirteen million, two hundred thirty-one thousand, three hundred thirty".