133265520 has 160 divisors (see below), whose sum is σ = 464256000. Its totient is φ = 35133696.

The previous prime is 133265507. The next prime is 133265521. The reversal of 133265520 is 25562331.

133265520 is a `hidden beast` number, since 1 + 3 + 3 + 2 + 655 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133265521) 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, 222181 + ... + 222779.

It is an arithmetic number, because the mean of its divisors is an integer number (2901600).

Almost surely, 2^133265520 is an apocalyptic number.

133265520 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 133265520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232128000).

133265520 is an abundant number, since it is smaller than the sum of its proper divisors (330990480).

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

133265520 is a wasteful number, since it uses less digits than its factorization.

133265520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 133265520 is about 11544.0686068647. The cubic root of 133265520 is about 510.7863302466.

The spelling of 133265520 in words is "one hundred thirty-three million, two hundred sixty-five thousand, five hundred twenty".