133239552 has 144 divisors (see below), whose sum is σ = 390485760. Its totient is φ = 40144896.

The previous prime is 133239551. The next prime is 133239569. The reversal of 133239552 is 255932331.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (133239551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335418 + ... + 335814.

Almost surely, 2^133239552 is an apocalyptic number.

133239552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133239552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195242880).

133239552 is an abundant number, since it is smaller than the sum of its proper divisors (257246208).

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

133239552 is a wasteful number, since it uses less digits than its factorization.

133239552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 444 counting only the distinct ones).

The product of its digits is 24300, while the sum is 33.

The square root of 133239552 is about 11542.9438186279. The cubic root of 133239552 is about 510.7531509690.

The spelling of 133239552 in words is "one hundred thirty-three million, two hundred thirty-nine thousand, five hundred fifty-two".