133331144 has 16 divisors (see below), whose sum is σ = 253161600. Its totient is φ = 65821392.

The previous prime is 133331129. The next prime is 133331147. The reversal of 133331144 is 441133331.

It is not an unprimeable number, because it can be changed into a prime (133331147) 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, 104852 + ... + 106115.

It is an arithmetic number, because the mean of its divisors is an integer number (15822600).

Almost surely, 2^133331144 is an apocalyptic number.

It is an amenable number.

133331144 is a deficient number, since it is larger than the sum of its proper divisors (119830456).

133331144 is a wasteful number, since it uses less digits than its factorization.

133331144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211052 (or 211048 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 133331144 is about 11546.9105824892. The cubic root of 133331144 is about 510.8701587358.

Adding to 133331144 its reverse (441133331), we get a palindrome (574464475).

The spelling of 133331144 in words is "one hundred thirty-three million, three hundred thirty-one thousand, one hundred forty-four".