133556201 has 4 divisors (see below), whose sum is σ = 135385812. Its totient is φ = 131726592.

The previous prime is 133556191. The next prime is 133556207. The reversal of 133556201 is 102655331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102655331 = 29 ⋅3539839.

It can be written as a sum of positive squares in 2 ways, for example, as 39000025 + 94556176 = 6245^2 + 9724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133556201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133556207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914696 + ... + 914841.

It is an arithmetic number, because the mean of its divisors is an integer number (33846453).

Almost surely, 2^133556201 is an apocalyptic number.

It is an amenable number.

133556201 is a deficient number, since it is larger than the sum of its proper divisors (1829611).

133556201 is an equidigital number, since it uses as much as digits as its factorization.

133556201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829610.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 133556201 is about 11556.6518075090. The cubic root of 133556201 is about 511.1574391406.

The spelling of 133556201 in words is "one hundred thirty-three million, five hundred fifty-six thousand, two hundred one".