231316215 has 24 divisors (see below), whose sum is σ = 400770000. Its totient is φ = 113877504.

The previous prime is 231316199. The next prime is 231316223. The reversal of 231316215 is 512613132.

It is not a de Polignac number, because 231316215 - 2⁴ = 231316199 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43090 + ... + 48159.

It is an arithmetic number, because the mean of its divisors is an integer number (16698750).

Almost surely, 2^231316215 is an apocalyptic number.

231316215 is a deficient number, since it is larger than the sum of its proper divisors (169453785).

231316215 is a wasteful number, since it uses less digits than its factorization.

231316215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91283 (or 91270 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 231316215 is about 15209.0833057091. The cubic root of 231316215 is about 613.8590917230.

Adding to 231316215 its reverse (512613132), we get a palindrome (743929347).

It can be divided in two parts, 2313 and 16215, that added together give a triangular number (18528 = T₁₉₂).

The spelling of 231316215 in words is "two hundred thirty-one million, three hundred sixteen thousand, two hundred fifteen".