133523201 has 4 divisors (see below), whose sum is σ = 152597952. Its totient is φ = 114448452.

The previous prime is 133523197. The next prime is 133523227. The reversal of 133523201 is 102325331.

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.

It is a cyclic number.

It is not a de Polignac number, because 133523201 - 2² = 133523197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133523501) 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, 9537365 + ... + 9537378.

It is an arithmetic number, because the mean of its divisors is an integer number (38149488).

Almost surely, 2^133523201 is an apocalyptic number.

It is an amenable number.

133523201 is a deficient number, since it is larger than the sum of its proper divisors (19074751).

133523201 is an equidigital number, since it uses as much as digits as its factorization.

133523201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19074750.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 133523201 is about 11555.2239701358. The cubic root of 133523201 is about 511.1153355546.

Adding to 133523201 its reverse (102325331), we get a palindrome (235848532).

The spelling of 133523201 in words is "one hundred thirty-three million, five hundred twenty-three thousand, two hundred one".