221143030 has 16 divisors (see below), whose sum is σ = 405568944. Its totient is φ = 86788000.

The previous prime is 221143019. The next prime is 221143031. The reversal of 221143030 is 30341122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221142995 and 221143013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221143031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208096 + ... + 209155.

It is an arithmetic number, because the mean of its divisors is an integer number (25348059).

Almost surely, 2^221143030 is an apocalyptic number.

221143030 is a deficient number, since it is larger than the sum of its proper divisors (184425914).

221143030 is a wasteful number, since it uses less digits than its factorization.

221143030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417311.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221143030 is about 14870.8785887048. The cubic root of 221143030 is about 604.7247615357.

Adding to 221143030 its reverse (30341122), we get a palindrome (251484152).

The spelling of 221143030 in words is "two hundred twenty-one million, one hundred forty-three thousand, thirty".