204308520025 has 9 divisors (see below), whose sum is σ = 253345367293. Its totient is φ = 163445008000.

The previous prime is 204308520011. The next prime is 204308520071. The reversal of 204308520025 is 520025803402.

The square root of 204308520025 is 452005.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 32285980489 + 172022539536 = 179683^2 + 414756^2 .

It is not a de Polignac number, because 204308520025 - 2⁵ = 204308519993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2214825 + ... + 2305225.

Almost surely, 2^204308520025 is an apocalyptic number.

204308520025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

204308520025 is the 452005-th square number.

204308520025 is the 226003-rd centered octagonal number.

It is an amenable number.

204308520025 is a deficient number, since it is larger than the sum of its proper divisors (49036847268).

204308520025 is an frugal number, since it uses more digits than its factorization.

204308520025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180812 (or 90406 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 204308520025 in words is "two hundred four billion, three hundred eight million, five hundred twenty thousand, twenty-five".