133550440 has 32 divisors (see below), whose sum is σ = 302492160. Its totient is φ = 53064000.

The previous prime is 133550429. The next prime is 133550441. The reversal of 133550440 is 44055331.

It is a Smith number, since the sum of its digits (25) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (133550441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5016 + ... + 17095.

It is an arithmetic number, because the mean of its divisors is an integer number (9452880).

Almost surely, 2^133550440 is an apocalyptic number.

133550440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133550440 is an abundant number, since it is smaller than the sum of its proper divisors (168941720).

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

133550440 is a wasteful number, since it uses less digits than its factorization.

133550440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22273 (or 22269 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 133550440 is about 11556.4025544284. The cubic root of 133550440 is about 511.1500893749.

The spelling of 133550440 in words is "one hundred thirty-three million, five hundred fifty thousand, four hundred forty".