133500234 has 64 divisors (see below), whose sum is σ = 321490944. Its totient is φ = 36132096.

The previous prime is 133500233. The next prime is 133500259. The reversal of 133500234 is 432005331.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 133500234.

It is not an unprimeable number, because it can be changed into a prime (133500233) 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, 108547 + ... + 109769.

It is an arithmetic number, because the mean of its divisors is an integer number (5023296).

Almost surely, 2^133500234 is an apocalyptic number.

133500234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133500234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160745472).

133500234 is an abundant number, since it is smaller than the sum of its proper divisors (187990710).

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

133500234 is a wasteful number, since it uses less digits than its factorization.

133500234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 133500234 is about 11554.2301344572. The cubic root of 133500234 is about 511.0860286403.

Adding to 133500234 its reverse (432005331), we get a palindrome (565505565).

The spelling of 133500234 in words is "one hundred thirty-three million, five hundred thousand, two hundred thirty-four".