133302221 has 4 divisors (see below), whose sum is σ = 143556252. Its totient is φ = 123048192.

The previous prime is 133302203. The next prime is 133302229. The reversal of 133302221 is 122203331.

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 84456100 + 48846121 = 9190^2 + 6989^2 .

It is a cyclic number.

It is not a de Polignac number, because 133302221 - 2¹⁴ = 133285837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133302221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133302229) 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, 5126996 + ... + 5127021.

It is an arithmetic number, because the mean of its divisors is an integer number (35889063).

Almost surely, 2^133302221 is an apocalyptic number.

It is an amenable number.

133302221 is a deficient number, since it is larger than the sum of its proper divisors (10254031).

133302221 is a wasteful number, since it uses less digits than its factorization.

133302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10254030.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 133302221 is about 11545.6581016415. The cubic root of 133302221 is about 510.8332157138.

Adding to 133302221 its reverse (122203331), we get a palindrome (255505552).

It can be divided in two parts, 13330 and 2221, that added together give a palindrome (15551).

The spelling of 133302221 in words is "one hundred thirty-three million, three hundred two thousand, two hundred twenty-one".