133720203 has 4 divisors (see below), whose sum is σ = 178293608. Its totient is φ = 89146800.

The previous prime is 133720163. The next prime is 133720211. The reversal of 133720203 is 302027331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133720203 - 2¹⁴ = 133703819 is a prime.

It is a super-2 number, since 2×133720203² = 35762185380722418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133720203.

It is not an unprimeable number, because it can be changed into a prime (133720273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22286698 + ... + 22286703.

It is an arithmetic number, because the mean of its divisors is an integer number (44573402).

Almost surely, 2^133720203 is an apocalyptic number.

133720203 is a deficient number, since it is larger than the sum of its proper divisors (44573405).

133720203 is an equidigital number, since it uses as much as digits as its factorization.

133720203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44573404.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 133720203 is about 11563.7451978155. The cubic root of 133720203 is about 511.3665809386.

Adding to 133720203 its reverse (302027331), we get a palindrome (435747534).

The spelling of 133720203 in words is "one hundred thirty-three million, seven hundred twenty thousand, two hundred three".