205415214025 has 60 divisors (see below), whose sum is σ = 302026351244. Its totient is φ = 138544560000.

The previous prime is 205415214001. The next prime is 205415214041. The reversal of 205415214025 is 520412514502.

It can be written as a sum of positive squares in 6 ways, for example, as 26720479296 + 178694734729 = 163464^2 + 422723^2 .

It is not a de Polignac number, because 205415214025 - 2⁷ = 205415213897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3633475 + ... + 3689575.

Almost surely, 2^205415214025 is an apocalyptic number.

205415214025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205415214025 is a deficient number, since it is larger than the sum of its proper divisors (96611137219).

205415214025 is an frugal number, since it uses more digits than its factorization.

205415214025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56200 (or 56174 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

Adding to 205415214025 its reverse (520412514502), we get a palindrome (725827728527).

The spelling of 205415214025 in words is "two hundred five billion, four hundred fifteen million, two hundred fourteen thousand, twenty-five".