231123729109 has 16 divisors (see below), whose sum is σ = 301192915968. Its totient is φ = 172110235392.

The previous prime is 231123729107. The next prime is 231123729121. The reversal of 231123729109 is 901927321132.

It is a cyclic number.

It is not a de Polignac number, because 231123729109 - 2¹ = 231123729107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231123729107) 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, 74699077 + ... + 74702170.

It is an arithmetic number, because the mean of its divisors is an integer number (18824557248).

Almost surely, 2^231123729109 is an apocalyptic number.

It is an amenable number.

231123729109 is a deficient number, since it is larger than the sum of its proper divisors (70069186859).

231123729109 is a wasteful number, since it uses less digits than its factorization.

231123729109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149401284.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 231123729109 in words is "two hundred thirty-one billion, one hundred twenty-three million, seven hundred twenty-nine thousand, one hundred nine".