133545918 has 32 divisors (see below), whose sum is σ = 293489280. Its totient is φ = 40174560.

The previous prime is 133545883. The next prime is 133545943. The reversal of 133545918 is 819545331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1896 + ... + 16452.

It is an arithmetic number, because the mean of its divisors is an integer number (9171540).

Almost surely, 2^133545918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133545918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146744640).

133545918 is an abundant number, since it is smaller than the sum of its proper divisors (159943362).

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

133545918 is a wasteful number, since it uses less digits than its factorization.

133545918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14712.

The product of its digits is 64800, while the sum is 39.

The square root of 133545918 is about 11556.2069036514. The cubic root of 133545918 is about 511.1443201520.

The spelling of 133545918 in words is "one hundred thirty-three million, five hundred forty-five thousand, nine hundred eighteen".