213241231 has 4 divisors (see below), whose sum is σ = 243704272. Its totient is φ = 182778192.

The previous prime is 213241213. The next prime is 213241247. The reversal of 213241231 is 132142312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 213241231 - 2⁹ = 213240719 is a prime.

It is a super-2 number, since 2×213241231² = 90943645196790722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213241199 and 213241208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213241291) 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, 15231510 + ... + 15231523.

It is an arithmetic number, because the mean of its divisors is an integer number (60926068).

Almost surely, 2^213241231 is an apocalyptic number.

213241231 is a deficient number, since it is larger than the sum of its proper divisors (30463041).

213241231 is an equidigital number, since it uses as much as digits as its factorization.

213241231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30463040.

The product of its digits is 288, while the sum is 19.

The square root of 213241231 is about 14602.7816185821. The cubic root of 213241231 is about 597.4346313646.

Adding to 213241231 its reverse (132142312), we get a palindrome (345383543).

The spelling of 213241231 in words is "two hundred thirteen million, two hundred forty-one thousand, two hundred thirty-one".