133120530 has 64 divisors (see below), whose sum is σ = 359539200. Its totient is φ = 35049456.

The previous prime is 133120513. The next prime is 133120531. The reversal of 133120530 is 35021331.

133120530 is a `hidden beast` number, since 13 + 3 + 120 + 530 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (133120531) 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, 1685031 + ... + 1685109.

It is an arithmetic number, because the mean of its divisors is an integer number (5617800).

Almost surely, 2^133120530 is an apocalyptic number.

133120530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133120530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179769600).

133120530 is an abundant number, since it is smaller than the sum of its proper divisors (226418670).

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

133120530 is an frugal number, since it uses more digits than its factorization.

133120530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 133120530 is about 11537.7870495169. The cubic root of 133120530 is about 510.6010215376.

133120530 divided by its product of nonzero digits (270) gives a cube (493039 = 79³).

Adding to 133120530 its reverse (35021331), we get a palindrome (168141861).

The spelling of 133120530 in words is "one hundred thirty-three million, one hundred twenty thousand, five hundred thirty".