204225551 has 8 divisors (see below), whose sum is σ = 215956608. Its totient is φ = 192816000.

The previous prime is 204225521. The next prime is 204225557. The reversal of 204225551 is 155522402.

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 204225551 - 2¹⁸ = 203963407 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 204225551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204225557) 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 7 ways as a sum of consecutive naturals, for example, 79070 + ... + 81611.

It is an arithmetic number, because the mean of its divisors is an integer number (26994576).

Almost surely, 2^204225551 is an apocalyptic number.

204225551 is a deficient number, since it is larger than the sum of its proper divisors (11731057).

204225551 is a wasteful number, since it uses less digits than its factorization.

204225551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160753.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 204225551 is about 14290.7505401221. The cubic root of 204225551 is about 588.8934069759.

Adding to 204225551 its reverse (155522402), we get a palindrome (359747953).

The spelling of 204225551 in words is "two hundred four million, two hundred twenty-five thousand, five hundred fifty-one".