133013550 has 48 divisors (see below), whose sum is σ = 335304432. Its totient is φ = 34886400.

The previous prime is 133013549. The next prime is 133013561. The reversal of 133013550 is 55310331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1882 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (6985509).

Almost surely, 2^133013550 is an apocalyptic number.

133013550 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 133013550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167652216).

133013550 is an abundant number, since it is smaller than the sum of its proper divisors (202290882).

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

133013550 is a wasteful number, since it uses less digits than its factorization.

133013550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14613 (or 14608 counting only the distinct ones).

The product of its (nonzero) digits is 675, while the sum is 21.

The square root of 133013550 is about 11533.1500467132. The cubic root of 133013550 is about 510.4642063361.

Adding to 133013550 its reverse (55310331), we get a palindrome (188323881).

The spelling of 133013550 in words is "one hundred thirty-three million, thirteen thousand, five hundred fifty".