204406451 has 8 divisors (see below), whose sum is σ = 215494944. Its totient is φ = 193501440.

The previous prime is 204406441. The next prime is 204406457. The reversal of 204406451 is 154604402.

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

It is a cyclic number.

It is not a de Polignac number, because 204406451 - 2⁶ = 204406387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204406451.

It is not an unprimeable number, because it can be changed into a prime (204406457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43580 + ... + 48041.

It is an arithmetic number, because the mean of its divisors is an integer number (26936868).

Almost surely, 2^204406451 is an apocalyptic number.

204406451 is a deficient number, since it is larger than the sum of its proper divisors (11088493).

204406451 is an equidigital number, since it uses as much as digits as its factorization.

204406451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91741.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 204406451 is about 14297.0784078426. The cubic root of 204406451 is about 589.0672333781.

The spelling of 204406451 in words is "two hundred four million, four hundred six thousand, four hundred fifty-one".