204117451 has 2 divisors, whose sum is σ = 204117452. Its totient is φ = 204117450.

The previous prime is 204117449. The next prime is 204117481. The reversal of 204117451 is 154711402.

204117451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204117451 - 2¹ = 204117449 is a prime.

Together with 204117449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204117401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102058725 + 102058726.

It is an arithmetic number, because the mean of its divisors is an integer number (102058726).

Almost surely, 2^204117451 is an apocalyptic number.

204117451 is a deficient number, since it is larger than the sum of its proper divisors (1).

204117451 is an equidigital number, since it uses as much as digits as its factorization.

204117451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 204117451 is about 14286.9678728553. The cubic root of 204117451 is about 588.7894849278.

Adding to 204117451 its reverse (154711402), we get a palindrome (358828853).

The spelling of 204117451 in words is "two hundred four million, one hundred seventeen thousand, four hundred fifty-one".