133320443 has 16 divisors (see below), whose sum is σ = 147873600. Its totient is φ = 119556096.

The previous prime is 133320433. The next prime is 133320449. The reversal of 133320443 is 344023331.

It is a cyclic number.

It is not a de Polignac number, because 133320443 - 2⁴ = 133320427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133320449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135971 + ... + 136947.

It is an arithmetic number, because the mean of its divisors is an integer number (9242100).

Almost surely, 2^133320443 is an apocalyptic number.

133320443 is a deficient number, since it is larger than the sum of its proper divisors (14553157).

133320443 is a wasteful number, since it uses less digits than its factorization.

133320443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366.

The product of its (nonzero) digits is 2592, while the sum is 23.

The square root of 133320443 is about 11546.4472024948. The cubic root of 133320443 is about 510.8564910918.

Adding to 133320443 its reverse (344023331), we get a palindrome (477343774).

The spelling of 133320443 in words is "one hundred thirty-three million, three hundred twenty thousand, four hundred forty-three".