213440325 has 48 divisors (see below), whose sum is σ = 411580800. Its totient is φ = 97560960.

The previous prime is 213440323. The next prime is 213440333. The reversal of 213440325 is 523044312.

It is not a de Polignac number, because 213440325 - 2¹ = 213440323 is a prime.

It is a super-2 number, since 2×213440325² = 91113544672211250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213440295 and 213440304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213440323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21577 + ... + 29873.

It is an arithmetic number, because the mean of its divisors is an integer number (8574600).

Almost surely, 2^213440325 is an apocalyptic number.

213440325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213440325 is a deficient number, since it is larger than the sum of its proper divisors (198140475).

213440325 is an equidigital number, since it uses as much as digits as its factorization.

213440325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8331 (or 8312 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 213440325 is about 14609.5970170296. The cubic root of 213440325 is about 597.6205063804.

Adding to 213440325 its reverse (523044312), we get a palindrome (736484637).

The spelling of 213440325 in words is "two hundred thirteen million, four hundred forty thousand, three hundred twenty-five".