133115305 has 4 divisors (see below), whose sum is σ = 159738372. Its totient is φ = 106492240.

The previous prime is 133115303. The next prime is 133115341. The reversal of 133115305 is 503511331.

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 73068304 + 60047001 = 8548^2 + 7749^2 .

It is not a de Polignac number, because 133115305 - 2¹ = 133115303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133115303) 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, 13311526 + ... + 13311535.

It is an arithmetic number, because the mean of its divisors is an integer number (39934593).

Almost surely, 2^133115305 is an apocalyptic number.

It is an amenable number.

133115305 is a deficient number, since it is larger than the sum of its proper divisors (26623067).

133115305 is an equidigital number, since it uses as much as digits as its factorization.

133115305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26623066.

The product of its (nonzero) digits is 675, while the sum is 22.

The square root of 133115305 is about 11537.5606173922. The cubic root of 133115305 is about 510.5943410622.

Adding to 133115305 its reverse (503511331), we get a palindrome (636626636).

The spelling of 133115305 in words is "one hundred thirty-three million, one hundred fifteen thousand, three hundred five".