133857500 has 60 divisors (see below), whose sum is σ = 334580400. Its totient is φ = 45888000.

The previous prime is 133857499. The next prime is 133857509. The reversal of 133857500 is 5758331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133857509) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13676 + ... + 21324.

It is an arithmetic number, because the mean of its divisors is an integer number (5576340).

Almost surely, 2^133857500 is an apocalyptic number.

133857500 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 133857500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167290200).

133857500 is an abundant number, since it is smaller than the sum of its proper divisors (200722900).

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

133857500 is an equidigital number, since it uses as much as digits as its factorization.

133857500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680 (or 7663 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 133857500 is about 11569.6802030134. The cubic root of 133857500 is about 511.5415360078.

The spelling of 133857500 in words is "one hundred thirty-three million, eight hundred fifty-seven thousand, five hundred".