231323213 has 8 divisors (see below), whose sum is σ = 263324736. Its totient is φ = 201150400.

The previous prime is 231323201. The next prime is 231323219. The reversal of 231323213 is 312323132.

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

It is not a de Polignac number, because 231323213 - 2⁸ = 231322957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323219) 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, 456908 + ... + 457413.

It is an arithmetic number, because the mean of its divisors is an integer number (32915592).

Almost surely, 2^231323213 is an apocalyptic number.

231323213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

231323213 is a deficient number, since it is larger than the sum of its proper divisors (32001523).

231323213 is a wasteful number, since it uses less digits than its factorization.

231323213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914355.

The product of its digits is 648, while the sum is 20.

The square root of 231323213 is about 15209.3133638570. The cubic root of 231323213 is about 613.8652820119.

Adding to 231323213 its reverse (312323132), we get a palindrome (543646345).

The spelling of 231323213 in words is "two hundred thirty-one million, three hundred twenty-three thousand, two hundred thirteen".