133815755 has 16 divisors (see below), whose sum is σ = 170299584. Its totient is φ = 100592640.

The previous prime is 133815751. The next prime is 133815757. The reversal of 133815755 is 557518331.

It is a happy number.

It is not a de Polignac number, because 133815755 - 2² = 133815751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133815751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89615 + ... + 91095.

It is an arithmetic number, because the mean of its divisors is an integer number (10643724).

Almost surely, 2^133815755 is an apocalyptic number.

133815755 is a deficient number, since it is larger than the sum of its proper divisors (36483829).

133815755 is a wasteful number, since it uses less digits than its factorization.

133815755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566.

The product of its digits is 63000, while the sum is 38.

The square root of 133815755 is about 11567.8759934571. The cubic root of 133815755 is about 511.4883537763.

The spelling of 133815755 in words is "one hundred thirty-three million, eight hundred fifteen thousand, seven hundred fifty-five".