221330132 has 12 divisors (see below), whose sum is σ = 387660756. Its totient is φ = 110569920.

The previous prime is 221330129. The next prime is 221330141. The reversal of 221330132 is 231033122.

221330132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 130051216 + 91278916 = 11404^2 + 9554^2 .

It is a super-2 number, since 2×221330132² = 97974054662274848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221330132.

It is a congruent number.

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, 18419 + ... + 27962.

It is an arithmetic number, because the mean of its divisors is an integer number (32305063).

Almost surely, 2^221330132 is an apocalyptic number.

It is an amenable number.

221330132 is a deficient number, since it is larger than the sum of its proper divisors (166330624).

221330132 is a wasteful number, since it uses less digits than its factorization.

221330132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47578 (or 47576 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 221330132 is about 14877.1681445092. The cubic root of 221330132 is about 604.8952595128.

Adding to 221330132 its reverse (231033122), we get a palindrome (452363254).

The spelling of 221330132 in words is "two hundred twenty-one million, three hundred thirty thousand, one hundred thirty-two".