133503305 has 8 divisors (see below), whose sum is σ = 172527432. Its totient is φ = 98587008.

The previous prime is 133503283. The next prime is 133503313. The reversal of 133503305 is 503305331.

It can be written as a sum of positive squares in 4 ways, for example, as 16949689 + 116553616 = 4117^2 + 10796^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133503305 - 2⁶ = 133503241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026884 + ... + 1027013.

It is an arithmetic number, because the mean of its divisors is an integer number (21565929).

Almost surely, 2^133503305 is an apocalyptic number.

It is an amenable number.

133503305 is a deficient number, since it is larger than the sum of its proper divisors (39024127).

133503305 is a wasteful number, since it uses less digits than its factorization.

133503305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053915.

The product of its (nonzero) digits is 2025, while the sum is 23.

The square root of 133503305 is about 11554.3630287437. The cubic root of 133503305 is about 511.0899475676.

Adding to 133503305 its reverse (503305331), we get a palindrome (636808636).

The spelling of 133503305 in words is "one hundred thirty-three million, five hundred three thousand, three hundred five".