133550 has 12 divisors (see below), whose sum is σ = 248496. Its totient is φ = 53400.

The previous prime is 133543. The next prime is 133559. The reversal of 133550 is 55331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1286 + ... + 1385.

It is an arithmetic number, because the mean of its divisors is an integer number (20708).

2¹³³⁵⁵⁰ is an apocalyptic number.

133550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133550 is a deficient number, since it is larger than the sum of its proper divisors (114946).

133550 is a wasteful number, since it uses less digits than its factorization.

133550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683 (or 2678 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 133550 is about 365.4449342924. Note that the first 3 decimals coincide. The cubic root of 133550 is about 51.1149528023.

Adding to 133550 its reverse (55331), we get a palindrome (188881).

The spelling of 133550 in words is "one hundred thirty-three thousand, five hundred fifty".