833028221 has 4 divisors (see below), whose sum is σ = 833471100. Its totient is φ = 832585344.

The previous prime is 833028199. The next prime is 833028223. The reversal of 833028221 is 122820338.

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 534256996 + 298771225 = 23114^2 + 17285^2 .

It is a cyclic number.

It is not a de Polignac number, because 833028221 - 2²² = 828833917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (833028223) 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, 218606 + ... + 222383.

It is an arithmetic number, because the mean of its divisors is an integer number (208367775).

Almost surely, 2^833028221 is an apocalyptic number.

It is an amenable number.

833028221 is a deficient number, since it is larger than the sum of its proper divisors (442879).

833028221 is a wasteful number, since it uses less digits than its factorization.

833028221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442878.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 833028221 is about 28862.2282750310. The cubic root of 833028221 is about 940.9211661821.

Adding to 833028221 its reverse (122820338), we get a palindrome (955848559).

The spelling of 833028221 in words is "eight hundred thirty-three million, twenty-eight thousand, two hundred twenty-one".