133281225 has 144 divisors (see below), whose sum is σ = 305635200. Its totient is φ = 55036800.

The previous prime is 133281221. The next prime is 133281259. The reversal of 133281225 is 522182331.

It is not a de Polignac number, because 133281225 - 2² = 133281221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133281221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 848847 + ... + 849003.

Almost surely, 2^133281225 is an apocalyptic number.

133281225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133281225 is an abundant number, since it is smaller than the sum of its proper divisors (172353975).

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

133281225 is a wasteful number, since it uses less digits than its factorization.

133281225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 183 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 133281225 is about 11544.7488062755. The cubic root of 133281225 is about 510.8063944118.

The spelling of 133281225 in words is "one hundred thirty-three million, two hundred eighty-one thousand, two hundred twenty-five".