221143210 has 16 divisors (see below), whose sum is σ = 404805600. Its totient is φ = 86957776.

The previous prime is 221143201. The next prime is 221143231. The reversal of 221143210 is 12341122.

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 7 ways as a sum of consecutive naturals, for example, 186820 + ... + 187999.

It is an arithmetic number, because the mean of its divisors is an integer number (25300350).

Almost surely, 2^221143210 is an apocalyptic number.

221143210 is a deficient number, since it is larger than the sum of its proper divisors (183662390).

221143210 is a wasteful number, since it uses less digits than its factorization.

221143210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374885.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221143210 is about 14870.8846408006. The cubic root of 221143210 is about 604.7249256081.

Adding to 221143210 its reverse (12341122), we get a palindrome (233484332).

The spelling of 221143210 in words is "two hundred twenty-one million, one hundred forty-three thousand, two hundred ten".