133500611 has 4 divisors (see below), whose sum is σ = 133643424. Its totient is φ = 133357800.

The previous prime is 133500607. The next prime is 133500613. The reversal of 133500611 is 116005331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 133500611 - 2² = 133500607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133500613) 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, 69995 + ... + 71876.

It is an arithmetic number, because the mean of its divisors is an integer number (33410856).

Almost surely, 2^133500611 is an apocalyptic number.

133500611 is a deficient number, since it is larger than the sum of its proper divisors (142813).

133500611 is an equidigital number, since it uses as much as digits as its factorization.

133500611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142812.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 133500611 is about 11554.2464488170. The cubic root of 133500611 is about 511.0865097362.

Adding to 133500611 its reverse (116005331), we get a palindrome (249505942).

The spelling of 133500611 in words is "one hundred thirty-three million, five hundred thousand, six hundred eleven".