213524345 has 4 divisors (see below), whose sum is σ = 256229220. Its totient is φ = 170819472.

The previous prime is 213524329. The next prime is 213524347. The reversal of 213524345 is 543425312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98327056 + 115197289 = 9916^2 + 10733^2 .

It is a cyclic number.

It is not a de Polignac number, because 213524345 - 2⁴ = 213524329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213524347) 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 3 ways as a sum of consecutive naturals, for example, 21352430 + ... + 21352439.

It is an arithmetic number, because the mean of its divisors is an integer number (64057305).

Almost surely, 2^213524345 is an apocalyptic number.

It is an amenable number.

213524345 is a deficient number, since it is larger than the sum of its proper divisors (42704875).

213524345 is an equidigital number, since it uses as much as digits as its factorization.

213524345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42704874.

The product of its digits is 14400, while the sum is 29.

The square root of 213524345 is about 14612.4722412055. The cubic root of 213524345 is about 597.6989131323.

Adding to 213524345 its reverse (543425312), we get a palindrome (756949657).

The spelling of 213524345 in words is "two hundred thirteen million, five hundred twenty-four thousand, three hundred forty-five".