231345215 has 8 divisors (see below), whose sum is σ = 277703088. Its totient is φ = 185016960.

The previous prime is 231345211. The next prime is 231345217. The reversal of 231345215 is 512543132.

It is a happy number.

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

It is not a de Polignac number, because 231345215 - 2² = 231345211 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 (231345211) 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, 17255 + ... + 27575.

It is an arithmetic number, because the mean of its divisors is an integer number (34712886).

Almost surely, 2^231345215 is an apocalyptic number.

231345215 is a deficient number, since it is larger than the sum of its proper divisors (46357873).

231345215 is a wasteful number, since it uses less digits than its factorization.

231345215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14809.

The product of its digits is 3600, while the sum is 26.

The square root of 231345215 is about 15210.0366534733. The cubic root of 231345215 is about 613.8847437218.

Adding to 231345215 its reverse (512543132), we get a palindrome (743888347).

The spelling of 231345215 in words is "two hundred thirty-one million, three hundred forty-five thousand, two hundred fifteen".