213231210 has 16 divisors (see below), whose sum is σ = 511754976. Its totient is φ = 56861648.

The previous prime is 213231197. The next prime is 213231353. The reversal of 213231210 is 12132312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 213231210.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3553824 + ... + 3553883.

It is an arithmetic number, because the mean of its divisors is an integer number (31984686).

Almost surely, 2^213231210 is an apocalyptic number.

213231210 is an abundant number, since it is smaller than the sum of its proper divisors (298523766).

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

213231210 is a wasteful number, since it uses less digits than its factorization.

213231210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107717.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 213231210 is about 14602.4384949912. The cubic root of 213231210 is about 597.4252726582.

Adding to 213231210 its reverse (12132312), we get a palindrome (225363522).

The spelling of 213231210 in words is "two hundred thirteen million, two hundred thirty-one thousand, two hundred ten".