231241213 has 8 divisors (see below), whose sum is σ = 265646528. Its totient is φ = 197178624.

The previous prime is 231241207. The next prime is 231241247. The reversal of 231241213 is 312142132.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231241213 - 2²¹ = 229144061 is a prime.

It is a super-2 number, since 2×231241213² = 106944997179422738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231841213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84231 + ... + 86932.

It is an arithmetic number, because the mean of its divisors is an integer number (33205816).

Almost surely, 2^231241213 is an apocalyptic number.

It is an amenable number.

231241213 is a deficient number, since it is larger than the sum of its proper divisors (34405315).

231241213 is a wasteful number, since it uses less digits than its factorization.

231241213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171363.

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

The square root of 231241213 is about 15206.6174082207. The cubic root of 231241213 is about 613.7927386335.

Adding to 231241213 its reverse (312142132), we get a palindrome (543383345).

The spelling of 231241213 in words is "two hundred thirty-one million, two hundred forty-one thousand, two hundred thirteen".