231240111 has 8 divisors (see below), whose sum is σ = 315490560. Its totient is φ = 150574872.

The previous prime is 231240101. The next prime is 231240131. The reversal of 231240111 is 111042132.

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

It is not a de Polignac number, because 231240111 - 2⁹ = 231239599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231240101) 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, 896151 + ... + 896408.

It is an arithmetic number, because the mean of its divisors is an integer number (39436320).

Almost surely, 2^231240111 is an apocalyptic number.

231240111 is a deficient number, since it is larger than the sum of its proper divisors (84250449).

231240111 is a wasteful number, since it uses less digits than its factorization.

231240111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792605.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 231240111 is about 15206.5811739523. The cubic root of 231240111 is about 613.7917636045.

Adding to 231240111 its reverse (111042132), we get a palindrome (342282243).

The spelling of 231240111 in words is "two hundred thirty-one million, two hundred forty thousand, one hundred eleven".