133216554 has 16 divisors (see below), whose sum is σ = 267419520. Its totient is φ = 44241120.

The previous prime is 133216549. The next prime is 133216583. The reversal of 133216554 is 455612331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39339 + ... + 42590.

It is an arithmetic number, because the mean of its divisors is an integer number (16713720).

Almost surely, 2^133216554 is an apocalyptic number.

133216554 is an abundant number, since it is smaller than the sum of its proper divisors (134202966).

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

133216554 is a wasteful number, since it uses less digits than its factorization.

133216554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82205.

The product of its digits is 10800, while the sum is 30.

The square root of 133216554 is about 11541.9475826223. The cubic root of 133216554 is about 510.7237628564.

Adding to 133216554 its reverse (455612331), we get a palindrome (588828885).

The spelling of 133216554 in words is "one hundred thirty-three million, two hundred sixteen thousand, five hundred fifty-four".