213441245 has 4 divisors (see below), whose sum is σ = 256129500. Its totient is φ = 170752992.

The previous prime is 213441227. The next prime is 213441251. The reversal of 213441245 is 542144312.

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 103652761 + 109788484 = 10181^2 + 10478^2 .

It is a cyclic number.

It is not a de Polignac number, because 213441245 - 2¹⁸ = 213179101 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 21344120 + ... + 21344129.

It is an arithmetic number, because the mean of its divisors is an integer number (64032375).

Almost surely, 2^213441245 is an apocalyptic number.

It is an amenable number.

213441245 is a deficient number, since it is larger than the sum of its proper divisors (42688255).

213441245 is an equidigital number, since it uses as much as digits as its factorization.

213441245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42688254.

The product of its digits is 3840, while the sum is 26.

The square root of 213441245 is about 14609.6285031482. The cubic root of 213441245 is about 597.6213650281.

Adding to 213441245 its reverse (542144312), we get a palindrome (755585557).

The spelling of 213441245 in words is "two hundred thirteen million, four hundred forty-one thousand, two hundred forty-five".