231243105 has 16 divisors (see below), whose sum is σ = 381924864. Its totient is φ = 119351040.

The previous prime is 231243097. The next prime is 231243109. The reversal of 231243105 is 501342132.

It is not a de Polignac number, because 231243105 - 2³ = 231243097 is a prime.

It is a super-2 number, since 2×231243105² = 106946747220082050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231243109) 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, 248184 + ... + 249113.

It is an arithmetic number, because the mean of its divisors is an integer number (23870304).

Almost surely, 2^231243105 is an apocalyptic number.

It is an amenable number.

231243105 is a deficient number, since it is larger than the sum of its proper divisors (150681759).

231243105 is a wasteful number, since it uses less digits than its factorization.

231243105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497336.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 231243105 is about 15206.6796178521. The cubic root of 231243105 is about 613.7944126325.

Adding to 231243105 its reverse (501342132), we get a palindrome (732585237).

The spelling of 231243105 in words is "two hundred thirty-one million, two hundred forty-three thousand, one hundred five".