231040215 has 64 divisors (see below), whose sum is σ = 473932800. Its totient is φ = 104602752.

The previous prime is 231040213. The next prime is 231040223. The reversal of 231040215 is 512040132.

It is not a de Polignac number, because 231040215 - 2¹ = 231040213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231040213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101884 + ... + 104126.

It is an arithmetic number, because the mean of its divisors is an integer number (7405200).

Almost surely, 2^231040215 is an apocalyptic number.

231040215 is an abundant number, since it is smaller than the sum of its proper divisors (242892585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231040215 is a wasteful number, since it uses less digits than its factorization.

231040215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2373 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 231040215 is about 15200.0070723668. The cubic root of 231040215 is about 613.6148480896.

Adding to 231040215 its reverse (512040132), we get a palindrome (743080347).

The spelling of 231040215 in words is "two hundred thirty-one million, forty thousand, two hundred fifteen".