203171055025 has 9 divisors (see below), whose sum is σ = 251934902881. Its totient is φ = 162535041040.

The previous prime is 203171055019. The next prime is 203171055083. The reversal of 203171055025 is 520550171302.

The square root of 203171055025 is 450745.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 94966899889 + 108204155136 = 308167^2 + 328944^2 .

It is not a de Polignac number, because 203171055025 - 2⁷ = 203171054897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2208651 + ... + 2298799.

Almost surely, 2^203171055025 is an apocalyptic number.

203171055025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

203171055025 is the 450745-th square number.

203171055025 is the 225373-rd centered octagonal number.

It is an amenable number.

203171055025 is a deficient number, since it is larger than the sum of its proper divisors (48763847856).

203171055025 is an frugal number, since it uses more digits than its factorization.

203171055025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180308 (or 90154 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 31.

The spelling of 203171055025 in words is "two hundred three billion, one hundred seventy-one million, fifty-five thousand, twenty-five".