133309755 has 24 divisors (see below), whose sum is σ = 231989472. Its totient is φ = 70815744.

The previous prime is 133309751. The next prime is 133309763. The reversal of 133309755 is 557903331.

It is a happy number.

It is not a de Polignac number, because 133309755 - 2² = 133309751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133309751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5802 + ... + 17328.

It is an arithmetic number, because the mean of its divisors is an integer number (9666228).

Almost surely, 2^133309755 is an apocalyptic number.

133309755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

133309755 is a deficient number, since it is larger than the sum of its proper divisors (98679717).

133309755 is a wasteful number, since it uses less digits than its factorization.

133309755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11795 (or 11792 counting only the distinct ones).

The product of its (nonzero) digits is 42525, while the sum is 36.

The square root of 133309755 is about 11545.9843668697. The cubic root of 133309755 is about 510.8428393217.

The spelling of 133309755 in words is "one hundred thirty-three million, three hundred nine thousand, seven hundred fifty-five".