133023144 has 32 divisors (see below), whose sum is σ = 333537120. Its totient is φ = 44210496.

The previous prime is 133023133. The next prime is 133023151. The reversal of 133023144 is 441320331.

It is a self number, because there is not a number n which added to its sum of digits gives 133023144.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342 + ... + 16314.

It is an arithmetic number, because the mean of its divisors is an integer number (10423035).

Almost surely, 2^133023144 is an apocalyptic number.

It is an amenable number.

133023144 is an abundant number, since it is smaller than the sum of its proper divisors (200513976).

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

133023144 is a wasteful number, since it uses less digits than its factorization.

133023144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16329 (or 16325 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 133023144 is about 11533.5659706788. The cubic root of 133023144 is about 510.4764789601.

Adding to 133023144 its reverse (441320331), we get a palindrome (574343475).

The spelling of 133023144 in words is "one hundred thirty-three million, twenty-three thousand, one hundred forty-four".