205031025 has 18 divisors (see below), whose sum is σ = 367233750. Its totient is φ = 109349760.

The previous prime is 205031011. The next prime is 205031053. The reversal of 205031025 is 520130502.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16573041 + 188457984 = 4071^2 + 13728^2 .

It is not a de Polignac number, because 205031025 - 2⁶ = 205030961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205030989 and 205031007.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 455400 + ... + 455849.

It is an arithmetic number, because the mean of its divisors is an integer number (20401875).

Almost surely, 2^205031025 is an apocalyptic number.

205031025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205031025 is a deficient number, since it is larger than the sum of its proper divisors (162202725).

205031025 is a wasteful number, since it uses less digits than its factorization.

205031025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911265 (or 911257 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 205031025 is about 14318.9044622834. The cubic root of 205031025 is about 589.6665979980. Note that the first 3 decimals are identical.

Adding to 205031025 its reverse (520130502), we get a palindrome (725161527).

It can be divided in two parts, 20503 and 1025, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 205031025 in words is "two hundred five million, thirty-one thousand, twenty-five".