133100442 has 16 divisors (see below), whose sum is σ = 295778880. Its totient is φ = 44366796.

The previous prime is 133100441. The next prime is 133100447. The reversal of 133100442 is 244001331.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (133100441) 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 7 ways as a sum of consecutive naturals, for example, 1232358 + ... + 1232465.

It is an arithmetic number, because the mean of its divisors is an integer number (18486180).

Almost surely, 2^133100442 is an apocalyptic number.

133100442 is an abundant number, since it is smaller than the sum of its proper divisors (162678438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133100442 is a wasteful number, since it uses less digits than its factorization.

133100442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464834 (or 2464828 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 133100442 is about 11536.9164857860. The cubic root of 133100442 is about 510.5753368710.

Adding to 133100442 its reverse (244001331), we get a palindrome (377101773).

The spelling of 133100442 in words is "one hundred thirty-three million, one hundred thousand, four hundred forty-two".