221300033 has 4 divisors (see below), whose sum is σ = 234317700. Its totient is φ = 208282368.

The previous prime is 221300021. The next prime is 221300039. The reversal of 221300033 is 330003122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123032464 + 98267569 = 11092^2 + 9913^2 .

It is not a de Polignac number, because 221300033 - 2¹² = 221295937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221299990 and 221300017.

It is not an unprimeable number, because it can be changed into a prime (221300039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6508808 + ... + 6508841.

It is an arithmetic number, because the mean of its divisors is an integer number (58579425).

Almost surely, 2^221300033 is an apocalyptic number.

It is an amenable number.

221300033 is a deficient number, since it is larger than the sum of its proper divisors (13017667).

221300033 is a wasteful number, since it uses less digits than its factorization.

221300033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13017666.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 221300033 is about 14876.1565264688. The cubic root of 221300033 is about 604.8678380804.

Adding to 221300033 its reverse (330003122), we get a palindrome (551303155).

The spelling of 221300033 in words is "two hundred twenty-one million, three hundred thousand, thirty-three".