213230220 has 48 divisors (see below), whose sum is σ = 682338048. Its totient is φ = 48738240.

The previous prime is 213230219. The next prime is 213230261. The reversal of 213230220 is 22032312.

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 213230220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253426 + ... + 254265.

It is an arithmetic number, because the mean of its divisors is an integer number (14215376).

Almost surely, 2^213230220 is an apocalyptic number.

213230220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213230220 is an abundant number, since it is smaller than the sum of its proper divisors (469107828).

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

213230220 is a wasteful number, since it uses less digits than its factorization.

213230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507710 (or 507708 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 213230220 is about 14602.4045965040. The cubic root of 213230220 is about 597.4243480719.

Adding to 213230220 its reverse (22032312), we get a palindrome (235262532).

The spelling of 213230220 in words is "two hundred thirteen million, two hundred thirty thousand, two hundred twenty".