203128025 has 12 divisors (see below), whose sum is σ = 252890064. Its totient is φ = 161850000.

The previous prime is 203128021. The next prime is 203128033. The reversal of 203128025 is 520821302.

It is not a de Polignac number, because 203128025 - 2² = 203128021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203128021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9911 + ... + 22460.

It is an arithmetic number, because the mean of its divisors is an integer number (21074172).

Almost surely, 2^203128025 is an apocalyptic number.

203128025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

203128025 is a deficient number, since it is larger than the sum of its proper divisors (49762039).

203128025 is a wasteful number, since it uses less digits than its factorization.

203128025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32632 (or 32627 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 203128025 is about 14252.2989373645. The cubic root of 203128025 is about 587.8365899823.

Adding to 203128025 its reverse (520821302), we get a palindrome (723949327).

The spelling of 203128025 in words is "two hundred three million, one hundred twenty-eight thousand, twenty-five".