133816225 has 6 divisors (see below), whose sum is σ = 165932150. Its totient is φ = 107052960.

The previous prime is 133816187. The next prime is 133816229. The reversal of 133816225 is 522618331.

It can be written as a sum of positive squares in 3 ways, for example, as 20736 + 133795489 = 144^2 + 11567^2 .

It is not a de Polignac number, because 133816225 - 2¹⁵ = 133783457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133816229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2676300 + ... + 2676349.

Almost surely, 2^133816225 is an apocalyptic number.

It is an amenable number.

133816225 is a deficient number, since it is larger than the sum of its proper divisors (32115925).

133816225 is an equidigital number, since it uses as much as digits as its factorization.

133816225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352659 (or 5352654 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 133816225 is about 11567.8963083181. The cubic root of 133816225 is about 511.4889526077.

The spelling of 133816225 in words is "one hundred thirty-three million, eight hundred sixteen thousand, two hundred twenty-five".