231134217 has 4 divisors (see below), whose sum is σ = 308178960. Its totient is φ = 154089476.

The previous prime is 231134161. The next prime is 231134243. The reversal of 231134217 is 712431132.

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 not a de Polignac number, because 231134217 - 2⁸ = 231133961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231134117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38522367 + ... + 38522372.

It is an arithmetic number, because the mean of its divisors is an integer number (77044740).

Almost surely, 2^231134217 is an apocalyptic number.

It is an amenable number.

231134217 is a deficient number, since it is larger than the sum of its proper divisors (77044743).

231134217 is an equidigital number, since it uses as much as digits as its factorization.

231134217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77044742.

The product of its digits is 1008, while the sum is 24.

The square root of 231134217 is about 15203.0989275213. The cubic root of 231134217 is about 613.6980561175.

Adding to 231134217 its reverse (712431132), we get a palindrome (943565349).

The spelling of 231134217 in words is "two hundred thirty-one million, one hundred thirty-four thousand, two hundred seventeen".