133811855 has 8 divisors (see below), whose sum is σ = 160638000. Its totient is φ = 107006976.

The previous prime is 133811849. The next prime is 133811863. The reversal of 133811855 is 558118331.

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 133811855 - 2¹⁴ = 133795471 is a prime.

It is a super-2 number, since 2×133811855² = 35811225077082050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 17231 + ... + 23759.

It is an arithmetic number, because the mean of its divisors is an integer number (20079750).

Almost surely, 2^133811855 is an apocalyptic number.

133811855 is a deficient number, since it is larger than the sum of its proper divisors (26826145).

133811855 is an equidigital number, since it uses as much as digits as its factorization.

133811855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10633.

The product of its digits is 14400, while the sum is 35.

The square root of 133811855 is about 11567.7074219570. The cubic root of 133811855 is about 511.4833846953.

The spelling of 133811855 in words is "one hundred thirty-three million, eight hundred eleven thousand, eight hundred fifty-five".