133534381 has 8 divisors (see below), whose sum is σ = 134971200. Its totient is φ = 132104640.

The previous prime is 133534367. The next prime is 133534409. The reversal of 133534381 is 183435331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133534381 - 2¹³ = 133526189 is a prime.

It is a super-2 number, since 2×133534381² = 35662861818106322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133534321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41685 + ... + 44773.

It is an arithmetic number, because the mean of its divisors is an integer number (16871400).

Almost surely, 2^133534381 is an apocalyptic number.

It is an amenable number.

133534381 is a deficient number, since it is larger than the sum of its proper divisors (1436819).

133534381 is a wasteful number, since it uses less digits than its factorization.

133534381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539.

The product of its digits is 12960, while the sum is 31.

The square root of 133534381 is about 11555.7077238913. The cubic root of 133534381 is about 511.1296005161.

The spelling of 133534381 in words is "one hundred thirty-three million, five hundred thirty-four thousand, three hundred eighty-one".