221344033 has 4 divisors (see below), whose sum is σ = 221522500. Its totient is φ = 221165568.

The previous prime is 221344031. The next prime is 221344043. The reversal of 221344033 is 330443122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 330443122 = 2 ⋅165221561.

It can be written as a sum of positive squares in 2 ways, for example, as 103469584 + 117874449 = 10172^2 + 10857^2 .

It is a cyclic number.

It is not a de Polignac number, because 221344033 - 2¹ = 221344031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221343995 and 221344013.

It is not an unprimeable number, because it can be changed into a prime (221344031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87360 + ... + 89857.

It is an arithmetic number, because the mean of its divisors is an integer number (55380625).

Almost surely, 2^221344033 is an apocalyptic number.

It is an amenable number.

221344033 is a deficient number, since it is larger than the sum of its proper divisors (178467).

221344033 is a wasteful number, since it uses less digits than its factorization.

221344033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178466.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 221344033 is about 14877.6353295811. The cubic root of 221344033 is about 604.9079230589.

Adding to 221344033 its reverse (330443122), we get a palindrome (551787155).

The spelling of 221344033 in words is "two hundred twenty-one million, three hundred forty-four thousand, thirty-three".