231140031311 has 16 divisors (see below), whose sum is σ = 265219497984. Its totient is φ = 197326239264.

The previous prime is 231140031263. The next prime is 231140031319. The reversal of 231140031311 is 113130041132.

It is a de Polignac number, because none of the positive numbers 2^k-231140031311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231140031319) 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, 3501170 + ... + 3566576.

It is an arithmetic number, because the mean of its divisors is an integer number (16576218624).

Almost surely, 2^231140031311 is an apocalyptic number.

231140031311 is a deficient number, since it is larger than the sum of its proper divisors (34079466673).

231140031311 is a wasteful number, since it uses less digits than its factorization.

231140031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67430.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 231140031311 its reverse (113130041132), we get a palindrome (344270072443).

The spelling of 231140031311 in words is "two hundred thirty-one billion, one hundred forty million, thirty-one thousand, three hundred eleven".