133521152 has 18 divisors (see below), whose sum is σ = 266521248. Its totient is φ = 66760448.

The previous prime is 133521119. The next prime is 133521163. The reversal of 133521152 is 251125331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260528 + ... + 261039.

It is an arithmetic number, because the mean of its divisors is an integer number (14806736).

Almost surely, 2^133521152 is an apocalyptic number.

It is an amenable number.

133521152 is a deficient number, since it is larger than the sum of its proper divisors (133000096).

133521152 is an frugal number, since it uses more digits than its factorization.

133521152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521583 (or 521569 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 133521152 is about 11555.1353085976. The cubic root of 133521152 is about 511.1127210759.

Adding to 133521152 its reverse (251125331), we get a palindrome (384646483).

The spelling of 133521152 in words is "one hundred thirty-three million, five hundred twenty-one thousand, one hundred fifty-two".