231712861373 has 4 divisors (see below), whose sum is σ = 264814698720. Its totient is φ = 198611024028.

The previous prime is 231712861363. The next prime is 231712861381. The reversal of 231712861373 is 373168217132.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231712861373 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 (231712861363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16550918663 + ... + 16550918676.

It is an arithmetic number, because the mean of its divisors is an integer number (66203674680).

Almost surely, 2^231712861373 is an apocalyptic number.

It is an amenable number.

231712861373 is a deficient number, since it is larger than the sum of its proper divisors (33101837347).

231712861373 is an equidigital number, since it uses as much as digits as its factorization.

231712861373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33101837346.

The product of its digits is 254016, while the sum is 44.

The spelling of 231712861373 in words is "two hundred thirty-one billion, seven hundred twelve million, eight hundred sixty-one thousand, three hundred seventy-three".