133224643 has 4 divisors (see below), whose sum is σ = 133806640. Its totient is φ = 132642648.

The previous prime is 133224607. The next prime is 133224659. The reversal of 133224643 is 346422331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133224643 - 2⁹ = 133224131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133224683) 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, 290655 + ... + 291112.

It is an arithmetic number, because the mean of its divisors is an integer number (33451660).

Almost surely, 2^133224643 is an apocalyptic number.

133224643 is a deficient number, since it is larger than the sum of its proper divisors (581997).

133224643 is an equidigital number, since it uses as much as digits as its factorization.

133224643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581996.

The product of its digits is 10368, while the sum is 28.

The square root of 133224643 is about 11542.2979947669. The cubic root of 133224643 is about 510.7340998123.

Adding to 133224643 its reverse (346422331), we get a palindrome (479646974).

The spelling of 133224643 in words is "one hundred thirty-three million, two hundred twenty-four thousand, six hundred forty-three".