231115227 has 32 divisors (see below), whose sum is σ = 359327232. Its totient is φ = 129406464.

The previous prime is 231115219. The next prime is 231115229. The reversal of 231115227 is 722511132.

It is not a de Polignac number, because 231115227 - 2³ = 231115219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231115197 and 231115206.

It is not an unprimeable number, because it can be changed into a prime (231115229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389443 + ... + 390035.

It is an arithmetic number, because the mean of its divisors is an integer number (11228976).

Almost surely, 2^231115227 is an apocalyptic number.

231115227 is a deficient number, since it is larger than the sum of its proper divisors (128212005).

231115227 is a wasteful number, since it uses less digits than its factorization.

231115227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947.

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

The square root of 231115227 is about 15202.4743709700. The cubic root of 231115227 is about 613.6812485018.

Adding to 231115227 its reverse (722511132), we get a palindrome (953626359).

The spelling of 231115227 in words is "two hundred thirty-one million, one hundred fifteen thousand, two hundred twenty-seven".