213240025 has 6 divisors (see below), whose sum is σ = 264417662. Its totient is φ = 170592000.

The previous prime is 213240017. The next prime is 213240037. The reversal of 213240025 is 520042312.

It can be written as a sum of positive squares in 3 ways, for example, as 8549776 + 204690249 = 2924^2 + 14307^2 .

It is not a de Polignac number, because 213240025 - 2³ = 213240017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213239984 and 213240011.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4264776 + ... + 4264825.

Almost surely, 2^213240025 is an apocalyptic number.

213240025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213240025 is a deficient number, since it is larger than the sum of its proper divisors (51177637).

213240025 is an equidigital number, since it uses as much as digits as its factorization.

213240025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529611 (or 8529606 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 213240025 is about 14602.7403250212. The cubic root of 213240025 is about 597.4335050853.

Adding to 213240025 its reverse (520042312), we get a palindrome (733282337).

The spelling of 213240025 in words is "two hundred thirteen million, two hundred forty thousand, twenty-five".