133800500 has 24 divisors (see below), whose sum is σ = 292221384. Its totient is φ = 53520000.

The previous prime is 133800487. The next prime is 133800503. The reversal of 133800500 is 5008331.

It can be written as a sum of positive squares in 4 ways, for example, as 38464804 + 95335696 = 6202^2 + 9764^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133800503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133301 + ... + 134300.

It is an arithmetic number, because the mean of its divisors is an integer number (12175891).

Almost surely, 2^133800500 is an apocalyptic number.

133800500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133800500 is an abundant number, since it is smaller than the sum of its proper divisors (158420884).

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

133800500 is a wasteful number, since it uses less digits than its factorization.

133800500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267620 (or 267608 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 133800500 is about 11567.2166055625. The cubic root of 133800500 is about 511.4689164752.

Adding to 133800500 its reverse (5008331), we get a palindrome (138808831).

The spelling of 133800500 in words is "one hundred thirty-three million, eight hundred thousand, five hundred".