133501021530 has 32 divisors (see below), whose sum is σ = 320438930688. Its totient is φ = 35596219200.

The previous prime is 133501021523. The next prime is 133501021531. The reversal of 133501021530 is 35120105331.

It is a self number, because there is not a number n which added to its sum of digits gives 133501021530.

It is not an unprimeable number, because it can be changed into a prime (133501021531) 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, 19375 + ... + 517085.

It is an arithmetic number, because the mean of its divisors is an integer number (10013716584).

Almost surely, 2^133501021530 is an apocalyptic number.

133501021530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133501021530 is an abundant number, since it is smaller than the sum of its proper divisors (186937909158).

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

133501021530 is a wasteful number, since it uses less digits than its factorization.

133501021530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506662.

The product of its (nonzero) digits is 1350, while the sum is 24.

Adding to 133501021530 its reverse (35120105331), we get a palindrome (168621126861).

The spelling of 133501021530 in words is "one hundred thirty-three billion, five hundred one million, twenty-one thousand, five hundred thirty".