133523004 has 48 divisors (see below), whose sum is σ = 326043648. Its totient is φ = 42449088.

The previous prime is 133522999. The next prime is 133523011. The reversal of 133523004 is 400325331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167134 + ... + 167930.

It is an arithmetic number, because the mean of its divisors is an integer number (6792576).

Almost surely, 2^133523004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133523004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163021824).

133523004 is an abundant number, since it is smaller than the sum of its proper divisors (192520644).

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

133523004 is a wasteful number, since it uses less digits than its factorization.

133523004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 133523004 is about 11555.2154458495. The cubic root of 133523004 is about 511.1150841881.

Adding to 133523004 its reverse (400325331), we get a palindrome (533848335).

The spelling of 133523004 in words is "one hundred thirty-three million, five hundred twenty-three thousand, four".