213313241 has 4 divisors (see below), whose sum is σ = 220668900. Its totient is φ = 205957584.

The previous prime is 213313223. The next prime is 213313253. The reversal of 213313241 is 142313312.

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 131790400 + 81522841 = 11480^2 + 9029^2 .

It is a cyclic number.

It is not a de Polignac number, because 213313241 - 2²² = 209118937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213313211) 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, 3677786 + ... + 3677843.

It is an arithmetic number, because the mean of its divisors is an integer number (55167225).

Almost surely, 2^213313241 is an apocalyptic number.

It is an amenable number.

213313241 is a deficient number, since it is larger than the sum of its proper divisors (7355659).

213313241 is an equidigital number, since it uses as much as digits as its factorization.

213313241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7355658.

The product of its digits is 432, while the sum is 20.

The square root of 213313241 is about 14605.2470365961. The cubic root of 213313241 is about 597.5018735608.

Adding to 213313241 its reverse (142313312), we get a palindrome (355626553).

The spelling of 213313241 in words is "two hundred thirteen million, three hundred thirteen thousand, two hundred forty-one".