204515125 has 8 divisors (see below), whose sum is σ = 255235032. Its totient is φ = 163612000.

The previous prime is 204515119. The next prime is 204515131. The reversal of 204515125 is 521515402.

It is an interprime number because it is at equal distance from previous prime (204515119) and next prime (204515131).

It can be written as a sum of positive squares in 4 ways, for example, as 13024881 + 191490244 = 3609^2 + 13838^2 .

It is not a de Polignac number, because 204515125 - 2¹⁵ = 204482357 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 204515125.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 817936 + ... + 818185.

It is an arithmetic number, because the mean of its divisors is an integer number (31904379).

Almost surely, 2^204515125 is an apocalyptic number.

204515125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204515125 is a deficient number, since it is larger than the sum of its proper divisors (50719907).

204515125 is an equidigital number, since it uses as much as digits as its factorization.

204515125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636136 (or 1636126 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 204515125 is about 14300.8784695207. The cubic root of 204515125 is about 589.1716086733.

The spelling of 204515125 in words is "two hundred four million, five hundred fifteen thousand, one hundred twenty-five".