133381365 has 16 divisors (see below), whose sum is σ = 229826688. Its totient is φ = 65664576.

The previous prime is 133381361. The next prime is 133381453. The reversal of 133381365 is 563183331.

It is not a de Polignac number, because 133381365 - 2² = 133381361 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133381361) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 341809 + ... + 342198.

It is an arithmetic number, because the mean of its divisors is an integer number (14364168).

Almost surely, 2^133381365 is an apocalyptic number.

133381365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133381365 is a deficient number, since it is larger than the sum of its proper divisors (96445323).

133381365 is a wasteful number, since it uses less digits than its factorization.

133381365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684028.

The product of its digits is 19440, while the sum is 33.

The square root of 133381365 is about 11549.0850286938. The cubic root of 133381365 is about 510.9342927629.

The spelling of 133381365 in words is "one hundred thirty-three million, three hundred eighty-one thousand, three hundred sixty-five".