204660551 has 8 divisors (see below), whose sum is σ = 208822944. Its totient is φ = 200524320.

The previous prime is 204660541. The next prime is 204660559. The reversal of 204660551 is 155066402.

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-204660551 is a prime.

It is a super-2 number, since 2×204660551² = 83771882271247202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204660559) 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, 9665 + ... + 22421.

It is an arithmetic number, because the mean of its divisors is an integer number (26102868).

Almost surely, 2^204660551 is an apocalyptic number.

204660551 is a deficient number, since it is larger than the sum of its proper divisors (4162393).

204660551 is a wasteful number, since it uses less digits than its factorization.

204660551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13081.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 204660551 is about 14305.9620787978. The cubic root of 204660551 is about 589.3112243778.

The spelling of 204660551 in words is "two hundred four million, six hundred sixty thousand, five hundred fifty-one".