133205434 has 4 divisors (see below), whose sum is σ = 199808154. Its totient is φ = 66602716.

The previous prime is 133205431. The next prime is 133205453. The reversal of 133205434 is 434502331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434502331 = 29 ⋅14982839.

It can be written as a sum of positive squares in only one way, i.e., 107226025 + 25979409 = 10355^2 + 5097^2 .

It is a junction number, because it is equal to n+sod(n) for n = 133205399 and 133205408.

It is not an unprimeable number, because it can be changed into a prime (133205431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33301357 + ... + 33301360.

Almost surely, 2^133205434 is an apocalyptic number.

133205434 is a deficient number, since it is larger than the sum of its proper divisors (66602720).

133205434 is an equidigital number, since it uses as much as digits as its factorization.

133205434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66602719.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 133205434 is about 11541.4658514419. The cubic root of 133205434 is about 510.7095518942.

Adding to 133205434 its reverse (434502331), we get a palindrome (567707765).

The spelling of 133205434 in words is "one hundred thirty-three million, two hundred five thousand, four hundred thirty-four".