133785055 has 4 divisors (see below), whose sum is σ = 160542072. Its totient is φ = 107028040.

The previous prime is 133785031. The next prime is 133785073. The reversal of 133785055 is 550587331.

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

It is not a de Polignac number, because 133785055 - 2¹¹ = 133783007 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 13378501 + ... + 13378510.

It is an arithmetic number, because the mean of its divisors is an integer number (40135518).

Almost surely, 2^133785055 is an apocalyptic number.

133785055 is a deficient number, since it is larger than the sum of its proper divisors (26757017).

133785055 is an equidigital number, since it uses as much as digits as its factorization.

133785055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26757016.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 133785055 is about 11566.5489667403. The cubic root of 133785055 is about 511.4492355787.

The spelling of 133785055 in words is "one hundred thirty-three million, seven hundred eighty-five thousand, fifty-five".