231412213 has 4 divisors (see below), whose sum is σ = 232230208. Its totient is φ = 230594220.

The previous prime is 231412201. The next prime is 231412231. The reversal of 231412213 is 312214132.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-231412213 is a prime.

It is a super-2 number, since 2×231412213² = 107103224651114738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231412253) 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, 408573 + ... + 409138.

It is an arithmetic number, because the mean of its divisors is an integer number (58057552).

Almost surely, 2^231412213 is an apocalyptic number.

It is an amenable number.

231412213 is a deficient number, since it is larger than the sum of its proper divisors (817995).

231412213 is an equidigital number, since it uses as much as digits as its factorization.

231412213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817994.

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

The square root of 231412213 is about 15212.2389213422. The cubic root of 231412213 is about 613.9439987192.

Adding to 231412213 its reverse (312214132), we get a palindrome (543626345).

The spelling of 231412213 in words is "two hundred thirty-one million, four hundred twelve thousand, two hundred thirteen".