213244241 has 4 divisors (see below), whose sum is σ = 243707712. Its totient is φ = 182780772.

The previous prime is 213244237. The next prime is 213244313. The reversal of 213244241 is 142442312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213244241 - 2² = 213244237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213244441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15231725 + ... + 15231738.

It is an arithmetic number, because the mean of its divisors is an integer number (60926928).

Almost surely, 2^213244241 is an apocalyptic number.

It is an amenable number.

213244241 is a deficient number, since it is larger than the sum of its proper divisors (30463471).

213244241 is an equidigital number, since it uses as much as digits as its factorization.

213244241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30463470.

The product of its digits is 1536, while the sum is 23.

The square root of 213244241 is about 14602.8846807745. The cubic root of 213244241 is about 597.4374423747.

Adding to 213244241 its reverse (142442312), we get a palindrome (355686553).

The spelling of 213244241 in words is "two hundred thirteen million, two hundred forty-four thousand, two hundred forty-one".