231215271 has 16 divisors (see below), whose sum is σ = 359520000. Its totient is φ = 132122424.

The previous prime is 231215261. The next prime is 231215287. The reversal of 231215271 is 172512132.

It is not a de Polignac number, because 231215271 - 2⁹ = 231214759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231215221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111321 + ... + 113378.

It is an arithmetic number, because the mean of its divisors is an integer number (22470000).

Almost surely, 2^231215271 is an apocalyptic number.

231215271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231215271 is a deficient number, since it is larger than the sum of its proper divisors (128304729).

231215271 is an equidigital number, since it uses as much as digits as its factorization.

231215271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224723 (or 224709 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 231215271 is about 15205.7644003845. The cubic root of 231215271 is about 613.7697848147.

The spelling of 231215271 in words is "two hundred thirty-one million, two hundred fifteen thousand, two hundred seventy-one".