133255320 has 128 divisors (see below), whose sum is σ = 439568640. Its totient is φ = 32048640.

The previous prime is 133255313. The next prime is 133255321. The reversal of 133255320 is 23552331.

It is a happy number.

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 (133255321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206919 + ... + 207561.

It is an arithmetic number, because the mean of its divisors is an integer number (3434130).

Almost surely, 2^133255320 is an apocalyptic number.

133255320 is a gapful number since it is divisible by the number (10) 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 133255320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219784320).

133255320 is an abundant number, since it is smaller than the sum of its proper divisors (306313320).

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

133255320 is a wasteful number, since it uses less digits than its factorization.

133255320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 133255320 is about 11543.6268130947. The cubic root of 133255320 is about 510.7732982348.

The spelling of 133255320 in words is "one hundred thirty-three million, two hundred fifty-five thousand, three hundred twenty".