204311312025 has 24 divisors (see below), whose sum is σ = 337807649760. Its totient is φ = 108961856640.

The previous prime is 204311312021. The next prime is 204311312047. The reversal of 204311312025 is 520213113402.

It is not a de Polignac number, because 204311312025 - 2² = 204311312021 is a prime.

It is a super-2 number, since 2×204311312025² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204311311986 and 204311312004.

It is not an unprimeable number, because it can be changed into a prime (204311312021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3802749 + ... + 3856101.

It is an arithmetic number, because the mean of its divisors is an integer number (14075318740).

Almost surely, 2^204311312025 is an apocalyptic number.

204311312025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

204311312025 is a deficient number, since it is larger than the sum of its proper divisors (133496337735).

204311312025 is a wasteful number, since it uses less digits than its factorization.

204311312025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104425 (or 104420 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 204311312025 its reverse (520213113402), we get a palindrome (724524425427).

The spelling of 204311312025 in words is "two hundred four billion, three hundred eleven million, three hundred twelve thousand, twenty-five".