205415025 has 24 divisors (see below), whose sum is σ = 340186560. Its totient is φ = 109371840.

The previous prime is 205415017. The next prime is 205415027. The reversal of 205415025 is 520514502.

It is a happy number.

205415025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 205415025 - 2³ = 205415017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205414986 and 205415004.

It is not an unprimeable number, because it can be changed into a prime (205415027) 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, 51244 + ... + 55106.

It is an arithmetic number, because the mean of its divisors is an integer number (14174440).

Almost surely, 2^205415025 is an apocalyptic number.

205415025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205415025 is a deficient number, since it is larger than the sum of its proper divisors (134771535).

205415025 is a wasteful number, since it uses less digits than its factorization.

205415025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585 (or 4580 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 205415025 is about 14332.3070369009. The cubic root of 205415025 is about 590.0344947753.

Adding to 205415025 its reverse (520514502), we get a palindrome (725929527).

The spelling of 205415025 in words is "two hundred five million, four hundred fifteen thousand, twenty-five".