221143532 has 12 divisors (see below), whose sum is σ = 388967040. Its totient is φ = 110010096.

The previous prime is 221143529. The next prime is 221143541. The reversal of 221143532 is 235341122.

It is a junction number, because it is equal to n+sod(n) for n = 221143498 and 221143507.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139532 + ... + 141107.

It is an arithmetic number, because the mean of its divisors is an integer number (32413920).

Almost surely, 2^221143532 is an apocalyptic number.

It is an amenable number.

221143532 is a deficient number, since it is larger than the sum of its proper divisors (167823508).

221143532 is a wasteful number, since it uses less digits than its factorization.

221143532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280840 (or 280838 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 221143532 is about 14870.8954673214. The cubic root of 221143532 is about 604.7252191153.

Adding to 221143532 its reverse (235341122), we get a palindrome (456484654).

The spelling of 221143532 in words is "two hundred twenty-one million, one hundred forty-three thousand, five hundred thirty-two".