231203332109 has 4 divisors (see below), whose sum is σ = 234370501116. Its totient is φ = 228036163104.

The previous prime is 231203332081. The next prime is 231203332127. The reversal of 231203332109 is 901233302132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134157375625 + 97045956484 = 366275^2 + 311522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231203332109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231203332309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1583584394 + ... + 1583584539.

It is an arithmetic number, because the mean of its divisors is an integer number (58592625279).

Almost surely, 2^231203332109 is an apocalyptic number.

It is an amenable number.

231203332109 is a deficient number, since it is larger than the sum of its proper divisors (3167169007).

231203332109 is an equidigital number, since it uses as much as digits as its factorization.

231203332109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167169006.

The product of its (nonzero) digits is 5832, while the sum is 29.

The spelling of 231203332109 in words is "two hundred thirty-one billion, two hundred three million, three hundred thirty-two thousand, one hundred nine".