133823825 has 6 divisors (see below), whose sum is σ = 165941574. Its totient is φ = 107059040.

The previous prime is 133823803. The next prime is 133823839. The reversal of 133823825 is 528328331.

It can be written as a sum of positive squares in 3 ways, for example, as 25684624 + 108139201 = 5068^2 + 10399^2 .

It is not a de Polignac number, because 133823825 - 2⁶ = 133823761 is a prime.

It is a super-2 number, since 2×133823825² = 35817632275261250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 2676452 + ... + 2676501.

It is an arithmetic number, because the mean of its divisors is an integer number (27656929).

Almost surely, 2^133823825 is an apocalyptic number.

It is an amenable number.

133823825 is a deficient number, since it is larger than the sum of its proper divisors (32117749).

133823825 is an equidigital number, since it uses as much as digits as its factorization.

133823825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5352963 (or 5352958 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 133823825 is about 11568.2247989914. The cubic root of 133823825 is about 511.4986356449.

The spelling of 133823825 in words is "one hundred thirty-three million, eight hundred twenty-three thousand, eight hundred twenty-five".