204105125225 has 6 divisors (see below), whose sum is σ = 253090355310. Its totient is φ = 163284100160.

The previous prime is 204105125219. The next prime is 204105125281. The reversal of 204105125225 is 522521501402.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 65145415696 + 138959709529 = 255236^2 + 372773^2 .

It is not a de Polignac number, because 204105125225 - 2⁸ = 204105124969 is a prime.

It is a super-2 number, since 2×204105125225² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4082102480 + ... + 4082102529.

It is an arithmetic number, because the mean of its divisors is an integer number (42181725885).

Almost surely, 2^204105125225 is an apocalyptic number.

204105125225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204105125225 is a deficient number, since it is larger than the sum of its proper divisors (48985230085).

204105125225 is an equidigital number, since it uses as much as digits as its factorization.

204105125225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8164205019 (or 8164205014 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 204105125225 its reverse (522521501402), we get a palindrome (726626626627).

The spelling of 204105125225 in words is "two hundred four billion, one hundred five million, one hundred twenty-five thousand, two hundred twenty-five".