133541856 has 108 divisors (see below), whose sum is σ = 441807912. Its totient is φ = 38150784.

The previous prime is 133541819. The next prime is 133541867. The reversal of 133541856 is 658145331.

133541856 is a `hidden beast` number, since 1 + 33 + 541 + 85 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 133541856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9381 + ... + 18843.

It is an arithmetic number, because the mean of its divisors is an integer number (4090814).

Almost surely, 2^133541856 is an apocalyptic number.

133541856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133541856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220903956).

133541856 is an abundant number, since it is smaller than the sum of its proper divisors (308266056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133541856 is a wasteful number, since it uses less digits than its factorization.

133541856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493 (or 9475 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 133541856 is about 11556.0311526060. The cubic root of 133541856 is about 511.1391376916.

The spelling of 133541856 in words is "one hundred thirty-three million, five hundred forty-one thousand, eight hundred fifty-six".