133311552 has 224 divisors, whose sum is σ = 421355520. Its totient is φ = 36741120.

The previous prime is 133311539. The next prime is 133311553. The reversal of 133311552 is 255113331.

133311552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133311553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1687449 + ... + 1687527.

Almost surely, 2^133311552 is an apocalyptic number.

133311552 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 133311552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210677760).

133311552 is an abundant number, since it is smaller than the sum of its proper divisors (288043968).

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

133311552 is a wasteful number, since it uses less digits than its factorization.

133311552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 159 counting only the distinct ones).

The product of its digits is 1350, while the sum is 24.

The square root of 133311552 is about 11546.0621858710. The cubic root of 133311552 is about 510.8451346788.

Adding to 133311552 its reverse (255113331), we get a palindrome (388424883).

The spelling of 133311552 in words is "one hundred thirty-three million, three hundred eleven thousand, five hundred fifty-two".