133049815 has 4 divisors (see below), whose sum is σ = 159659784. Its totient is φ = 106439848.

The previous prime is 133049789. The next prime is 133049831. The reversal of 133049815 is 518940331.

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 133049815 - 2¹⁷ = 132918743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13304977 + ... + 13304986.

It is an arithmetic number, because the mean of its divisors is an integer number (39914946).

Almost surely, 2^133049815 is an apocalyptic number.

133049815 is a deficient number, since it is larger than the sum of its proper divisors (26609969).

133049815 is an equidigital number, since it uses as much as digits as its factorization.

133049815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26609968.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 133049815 is about 11534.7221466319. The cubic root of 133049815 is about 510.5105933453.

The spelling of 133049815 in words is "one hundred thirty-three million, forty-nine thousand, eight hundred fifteen".