133413505 has 4 divisors (see below), whose sum is σ = 160096212. Its totient is φ = 106730800.

The previous prime is 133413499. The next prime is 133413517. The reversal of 133413505 is 505314331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 105185536 + 28227969 = 10256^2 + 5313^2 .

It is not a de Polignac number, because 133413505 - 2⁷ = 133413377 is a prime.

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 133413505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13341346 + ... + 13341355.

It is an arithmetic number, because the mean of its divisors is an integer number (40024053).

Almost surely, 2^133413505 is an apocalyptic number.

It is an amenable number.

133413505 is a deficient number, since it is larger than the sum of its proper divisors (26682707).

133413505 is an equidigital number, since it uses as much as digits as its factorization.

133413505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26682706.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 133413505 is about 11550.4763971015. The cubic root of 133413505 is about 510.9753282538.

Adding to 133413505 its reverse (505314331), we get a palindrome (638727836).

The spelling of 133413505 in words is "one hundred thirty-three million, four hundred thirteen thousand, five hundred five".