221330553 has 8 divisors (see below), whose sum is σ = 295253088. Its totient is φ = 147480864.

The previous prime is 221330533. The next prime is 221330569. The reversal of 221330553 is 355033122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221330553 - 2¹⁴ = 221314169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221330513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10675 + ... + 23592.

It is an arithmetic number, because the mean of its divisors is an integer number (36906636).

Almost surely, 2^221330553 is an apocalyptic number.

It is an amenable number.

221330553 is a deficient number, since it is larger than the sum of its proper divisors (73922535).

221330553 is a wasteful number, since it uses less digits than its factorization.

221330553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36423.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 221330553 is about 14877.1822937006. The cubic root of 221330553 is about 604.8956430436.

Adding to 221330553 its reverse (355033122), we get a palindrome (576363675).

The spelling of 221330553 in words is "two hundred twenty-one million, three hundred thirty thousand, five hundred fifty-three".