133331503 has 4 divisors (see below), whose sum is σ = 133367248. Its totient is φ = 133295760.

The previous prime is 133331501. The next prime is 133331509. The reversal of 133331503 is 305133331.

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

It is a cyclic number.

It is not a de Polignac number, because 133331503 - 2¹ = 133331501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133331501) 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, 11526 + ... + 19987.

It is an arithmetic number, because the mean of its divisors is an integer number (33341812).

Almost surely, 2^133331503 is an apocalyptic number.

133331503 is a deficient number, since it is larger than the sum of its proper divisors (35745).

133331503 is an equidigital number, since it uses as much as digits as its factorization.

133331503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35744.

The product of its (nonzero) digits is 1215, while the sum is 22.

The square root of 133331503 is about 11546.9261277623. The cubic root of 133331503 is about 510.8706172488.

Adding to 133331503 its reverse (305133331), we get a palindrome (438464834).

The spelling of 133331503 in words is "one hundred thirty-three million, three hundred thirty-one thousand, five hundred three".