133223321 has 32 divisors (see below), whose sum is σ = 170581248. Its totient is φ = 101053440.

The previous prime is 133223317. The next prime is 133223341. The reversal of 133223321 is 123322331.

It is a cyclic number.

It is not a de Polignac number, because 133223321 - 2² = 133223317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133223293 and 133223302.

It is not an unprimeable number, because it can be changed into a prime (133223341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769991 + ... + 770163.

It is an arithmetic number, because the mean of its divisors is an integer number (5330664).

Almost surely, 2^133223321 is an apocalyptic number.

133223321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133223321 is a deficient number, since it is larger than the sum of its proper divisors (37357927).

133223321 is a wasteful number, since it uses less digits than its factorization.

133223321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401.

The product of its digits is 648, while the sum is 20.

The square root of 133223321 is about 11542.2407269992. The cubic root of 133223321 is about 510.7324104534.

Adding to 133223321 its reverse (123322331), we get a palindrome (256545652).

The spelling of 133223321 in words is "one hundred thirty-three million, two hundred twenty-three thousand, three hundred twenty-one".