133503563 has 4 divisors (see below), whose sum is σ = 135692208. Its totient is φ = 131314920.

The previous prime is 133503529. The next prime is 133503571. The reversal of 133503563 is 365305331.

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 133503563 - 2¹² = 133499467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133503583) 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, 1094231 + ... + 1094352.

It is an arithmetic number, because the mean of its divisors is an integer number (33923052).

Almost surely, 2^133503563 is an apocalyptic number.

133503563 is a deficient number, since it is larger than the sum of its proper divisors (2188645).

133503563 is an equidigital number, since it uses as much as digits as its factorization.

133503563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188644.

The product of its (nonzero) digits is 12150, while the sum is 29.

The square root of 133503563 is about 11554.3741933521. The cubic root of 133503563 is about 511.0902768008.

Adding to 133503563 its reverse (365305331), we get a palindrome (498808894).

The spelling of 133503563 in words is "one hundred thirty-three million, five hundred three thousand, five hundred sixty-three".