204551290 has 8 divisors (see below), whose sum is σ = 368192340. Its totient is φ = 81820512.

The previous prime is 204551279. The next prime is 204551323. The reversal of 204551290 is 92155402.

It can be written as a sum of positive squares in 2 ways, for example, as 204175521 + 375769 = 14289^2 + 613^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10227555 + ... + 10227574.

Almost surely, 2^204551290 is an apocalyptic number.

204551290 is a deficient number, since it is larger than the sum of its proper divisors (163641050).

204551290 is a wasteful number, since it uses less digits than its factorization.

204551290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20455136.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 204551290 is about 14302.1428464409. The cubic root of 204551290 is about 589.2063349319.

It can be divided in two parts, 2045 and 51290, that added together give a palindrome (53335).

The spelling of 204551290 in words is "two hundred four million, five hundred fifty-one thousand, two hundred ninety".