333222221 has 4 divisors (see below), whose sum is σ = 333258972. Its totient is φ = 333185472.

The previous prime is 333222217. The next prime is 333222233. The reversal of 333222221 is 122222333.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 122222333 = 17 ⋅7189549.

It can be written as a sum of positive squares in 2 ways, for example, as 297390025 + 35832196 = 17245^2 + 5986^2 .

It is a cyclic number.

It is not a de Polignac number, because 333222221 - 2² = 333222217 is a prime.

It is a super-2 number, since 2×333222221² = 222074097136345682, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 333222193 and 333222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (333222271) 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, 6035 + ... + 26511.

It is an arithmetic number, because the mean of its divisors is an integer number (83314743).

Almost surely, 2^333222221 is an apocalyptic number.

It is an amenable number.

333222221 is a deficient number, since it is larger than the sum of its proper divisors (36751).

333222221 is a wasteful number, since it uses less digits than its factorization.

333222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36750.

The product of its digits is 864, while the sum is 20.

The square root of 333222221 is about 18254.3753933132. The cubic root of 333222221 is about 693.2842247998.

Adding to 333222221 its reverse (122222333), we get a palindrome (455444554).

The spelling of 333222221 in words is "three hundred thirty-three million, two hundred twenty-two thousand, two hundred twenty-one".