231122231 has 8 divisors (see below), whose sum is σ = 234015840. Its totient is φ = 228235392.

The previous prime is 231122189. The next prime is 231122273. The reversal of 231122231 is 132221132.

It is an interprime number because it is at equal distance from previous prime (231122189) and next prime (231122273).

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

It is a cyclic number.

It is not a de Polignac number, because 231122231 - 2¹⁰ = 231121207 is a prime.

It is a super-2 number, since 2×231122231² = 106834971324834722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231122131) 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, 114971 + ... + 116963.

It is an arithmetic number, because the mean of its divisors is an integer number (29251980).

Almost surely, 2^231122231 is an apocalyptic number.

231122231 is a deficient number, since it is larger than the sum of its proper divisors (2893609).

231122231 is a wasteful number, since it uses less digits than its factorization.

231122231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385.

The product of its digits is 144, while the sum is 17.

The square root of 231122231 is about 15202.7047264623. The cubic root of 231122231 is about 613.6874476895.

Adding to 231122231 its reverse (132221132), we get a palindrome (363343363).

It can be divided in two parts, 2311 and 22231, that added together give a palindrome (24542).

The spelling of 231122231 in words is "two hundred thirty-one million, one hundred twenty-two thousand, two hundred thirty-one".