133700520 has 128 divisors (see below), whose sum is σ = 418775040. Its totient is φ = 34110720.

The previous prime is 133700513. The next prime is 133700533. The reversal of 133700520 is 25007331.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472299 + ... + 472581.

It is an arithmetic number, because the mean of its divisors is an integer number (3271680).

Almost surely, 2^133700520 is an apocalyptic number.

133700520 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 133700520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209387520).

133700520 is an abundant number, since it is smaller than the sum of its proper divisors (285074520).

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

133700520 is a wasteful number, since it uses less digits than its factorization.

133700520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 133700520 is about 11562.8941013917. The cubic root of 133700520 is about 511.3414894364.

Adding to 133700520 its reverse (25007331), we get a palindrome (158707851).

The spelling of 133700520 in words is "one hundred thirty-three million, seven hundred thousand, five hundred twenty".