2171268025 has 6 divisors (see below), whose sum is σ = 2692372382. Its totient is φ = 1737014400.

The previous prime is 2171268023. The next prime is 2171268061. The reversal of 2171268025 is 5208621712.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 826281 + 2170441744 = 909^2 + 46588^2 .

It is not a de Polignac number, because 2171268025 - 2¹ = 2171268023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171268023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43425336 + ... + 43425385.

Almost surely, 2^2171268025 is an apocalyptic number.

2171268025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2171268025 is a deficient number, since it is larger than the sum of its proper divisors (521104357).

2171268025 is an equidigital number, since it uses as much as digits as its factorization.

2171268025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86850731 (or 86850726 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 2171268025 is about 46596.8671157193. The cubic root of 2171268025 is about 1294.9047151410.

Adding to 2171268025 its reverse (5208621712), we get a palindrome (7379889737).

The spelling of 2171268025 in words is "two billion, one hundred seventy-one million, two hundred sixty-eight thousand, twenty-five".