205133451 has 4 divisors (see below), whose sum is σ = 273511272. Its totient is φ = 136755632.

The previous prime is 205133447. The next prime is 205133459. The reversal of 205133451 is 154331502.

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 205133451 - 2² = 205133447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205133459) 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, 34188906 + ... + 34188911.

It is an arithmetic number, because the mean of its divisors is an integer number (68377818).

Almost surely, 2^205133451 is an apocalyptic number.

205133451 is a deficient number, since it is larger than the sum of its proper divisors (68377821).

205133451 is an equidigital number, since it uses as much as digits as its factorization.

205133451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68377820.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 205133451 is about 14322.4806161503. The cubic root of 205133451 is about 589.7647736056.

Adding to 205133451 its reverse (154331502), we get a palindrome (359464953).

The spelling of 205133451 in words is "two hundred five million, one hundred thirty-three thousand, four hundred fifty-one".