133559550 has 192 divisors, whose sum is σ = 399974400. Its totient is φ = 32659200.

The previous prime is 133559521. The next prime is 133559557. The reversal of 133559550 is 55955331.

133559550 is a `hidden beast` number, since 13 + 3 + 5 + 595 + 50 = 666.

It is a super-3 number, since 3×133559550³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133559557) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1051587 + ... + 1051713.

It is an arithmetic number, because the mean of its divisors is an integer number (2083200).

Almost surely, 2^133559550 is an apocalyptic number.

133559550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 133559550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199987200).

133559550 is an abundant number, since it is smaller than the sum of its proper divisors (266414850).

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

133559550 is a wasteful number, since it uses less digits than its factorization.

133559550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 50625, while the sum is 36.

The square root of 133559550 is about 11556.7967015086. The cubic root of 133559550 is about 511.1617116290.

The spelling of 133559550 in words is "one hundred thirty-three million, five hundred fifty-nine thousand, five hundred fifty".