231361811329 has 4 divisors (see below), whose sum is σ = 252394703280. Its totient is φ = 210328919380.

The previous prime is 231361811311. The next prime is 231361811381. The reversal of 231361811329 is 923118163132.

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-231361811329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231361811291 and 231361811300.

It is not an unprimeable number, because it can be changed into a prime (231361811399) 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, 10516445959 + ... + 10516445980.

It is an arithmetic number, because the mean of its divisors is an integer number (63098675820).

Almost surely, 2^231361811329 is an apocalyptic number.

It is an amenable number.

231361811329 is a deficient number, since it is larger than the sum of its proper divisors (21032891951).

231361811329 is a wasteful number, since it uses less digits than its factorization.

231361811329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21032891950.

The product of its digits is 46656, while the sum is 40.

The spelling of 231361811329 in words is "two hundred thirty-one billion, three hundred sixty-one million, eight hundred eleven thousand, three hundred twenty-nine".