133206553 has 4 divisors (see below), whose sum is σ = 133474000. Its totient is φ = 132939108.

The previous prime is 133206533. The next prime is 133206559. The reversal of 133206553 is 355602331.

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 133206553 - 2²¹ = 131109401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133206559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132975 + ... + 133972.

It is an arithmetic number, because the mean of its divisors is an integer number (33368500).

Almost surely, 2^133206553 is an apocalyptic number.

It is an amenable number.

133206553 is a deficient number, since it is larger than the sum of its proper divisors (267447).

133206553 is an equidigital number, since it uses as much as digits as its factorization.

133206553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267446.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 133206553 is about 11541.5143287179. The cubic root of 133206553 is about 510.7109819719.

Adding to 133206553 its reverse (355602331), we get a palindrome (488808884).

The spelling of 133206553 in words is "one hundred thirty-three million, two hundred six thousand, five hundred fifty-three".