133555641 has 8 divisors (see below), whose sum is σ = 185816640. Its totient is φ = 85165872.

The previous prime is 133555637. The next prime is 133555651. The reversal of 133555641 is 146555331.

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

It is not a de Polignac number, because 133555641 - 2² = 133555637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133555651) 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 7 ways as a sum of consecutive naturals, for example, 967726 + ... + 967863.

It is an arithmetic number, because the mean of its divisors is an integer number (23227080).

Almost surely, 2^133555641 is an apocalyptic number.

It is an amenable number.

133555641 is a deficient number, since it is larger than the sum of its proper divisors (52260999).

133555641 is a wasteful number, since it uses less digits than its factorization.

133555641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935615.

The product of its digits is 27000, while the sum is 33.

The square root of 133555641 is about 11556.6275790128. The cubic root of 133555641 is about 511.1567247134.

The spelling of 133555641 in words is "one hundred thirty-three million, five hundred fifty-five thousand, six hundred forty-one".