133805201 has 4 divisors (see below), whose sum is σ = 140847600. Its totient is φ = 126762804.

The previous prime is 133805183. The next prime is 133805257. The reversal of 133805201 is 102508331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102508331 = 89 ⋅1151779.

It is a cyclic number.

It is not a de Polignac number, because 133805201 - 2¹⁴ = 133788817 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (133805281) 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, 3521171 + ... + 3521208.

It is an arithmetic number, because the mean of its divisors is an integer number (35211900).

Almost surely, 2^133805201 is an apocalyptic number.

It is an amenable number.

133805201 is a deficient number, since it is larger than the sum of its proper divisors (7042399).

133805201 is an equidigital number, since it uses as much as digits as its factorization.

133805201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7042398.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 133805201 is about 11567.4198073728. The cubic root of 133805201 is about 511.4749064559.

It can be divided in two parts, 13380 and 5201, that added together give a palindrome (18581).

The spelling of 133805201 in words is "one hundred thirty-three million, eight hundred five thousand, two hundred one".