204040451 has 8 divisors (see below), whose sum is σ = 205902000. Its totient is φ = 202185760.

The previous prime is 204040427. The next prime is 204040457. The reversal of 204040451 is 154040402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204040451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204040457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71765 + ... + 74553.

It is an arithmetic number, because the mean of its divisors is an integer number (25737750).

Almost surely, 2^204040451 is an apocalyptic number.

204040451 is a deficient number, since it is larger than the sum of its proper divisors (1861549).

204040451 is a wasteful number, since it uses less digits than its factorization.

204040451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 204040451 is about 14284.2728551369. The cubic root of 204040451 is about 588.7154385194.

Adding to 204040451 its reverse (154040402), we get a palindrome (358080853).

The spelling of 204040451 in words is "two hundred four million, forty thousand, four hundred fifty-one".