213115325 has 6 divisors (see below), whose sum is σ = 264263034. Its totient is φ = 170492240.

The previous prime is 213115321. The next prime is 213115333. The reversal of 213115325 is 523511312.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5812921 + 207302404 = 2411^2 + 14398^2 .

It is not a de Polignac number, because 213115325 - 2² = 213115321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213115325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213115321) 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, 4262282 + ... + 4262331.

It is an arithmetic number, because the mean of its divisors is an integer number (44043839).

Almost surely, 2^213115325 is an apocalyptic number.

213115325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213115325 is a deficient number, since it is larger than the sum of its proper divisors (51147709).

213115325 is an equidigital number, since it uses as much as digits as its factorization.

213115325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8524623 (or 8524618 counting only the distinct ones).

The product of its digits is 900, while the sum is 23.

The square root of 213115325 is about 14598.4699540740. The cubic root of 213115325 is about 597.3170252562.

Adding to 213115325 its reverse (523511312), we get a palindrome (736626637).

The spelling of 213115325 in words is "two hundred thirteen million, one hundred fifteen thousand, three hundred twenty-five".