133205711 has 4 divisors (see below), whose sum is σ = 133660632. Its totient is φ = 132750792.

The previous prime is 133205641. The next prime is 133205731. The reversal of 133205711 is 117502331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133205711 is a prime.

It is a super-2 number, since 2×133205711² = 35487522886031042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133205731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227021 + ... + 227606.

It is an arithmetic number, because the mean of its divisors is an integer number (33415158).

Almost surely, 2^133205711 is an apocalyptic number.

133205711 is a deficient number, since it is larger than the sum of its proper divisors (454921).

133205711 is an equidigital number, since it uses as much as digits as its factorization.

133205711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454920.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 133205711 is about 11541.4778516445. The cubic root of 133205711 is about 510.7099058999.

The spelling of 133205711 in words is "one hundred thirty-three million, two hundred five thousand, seven hundred eleven".