133513530 has 32 divisors (see below), whose sum is σ = 323434944. Its totient is φ = 35270016.

The previous prime is 133513517. The next prime is 133513537. The reversal of 133513530 is 35315331.

It is a self number, because there is not a number n which added to its sum of digits gives 133513530.

It is not an unprimeable number, because it can be changed into a prime (133513537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17587 + ... + 24006.

It is an arithmetic number, because the mean of its divisors is an integer number (10107342).

Almost surely, 2^133513530 is an apocalyptic number.

133513530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133513530 is an abundant number, since it is smaller than the sum of its proper divisors (189921414).

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

133513530 is a wasteful number, since it uses less digits than its factorization.

133513530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41710.

The product of its (nonzero) digits is 2025, while the sum is 24.

The square root of 133513530 is about 11554.8054938194. The cubic root of 133513530 is about 511.1029953378.

Adding to 133513530 its reverse (35315331), we get a palindrome (168828861).

The spelling of 133513530 in words is "one hundred thirty-three million, five hundred thirteen thousand, five hundred thirty".