6831631560121 has 3 divisors (see below), whose sum is σ = 6831634173861. Its totient is φ = 6831628946382.

The previous prime is 6831631560113. The next prime is 6831631560167. The reversal of 6831631560121 is 1210651361386.

The square root of 6831631560121 is 2613739.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 6831631560121 - 2³ = 6831631560113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6831631563121) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1306870 + ... + 3920608.

It is an arithmetic number, because the mean of its divisors is an integer number (2277211391287).

Almost surely, 2^{6831631560121} is an apocalyptic number.

6831631560121 is the 2613739-th square number.

6831631560121 is the 1306870-th centered octagonal number.

It is an amenable number.

6831631560121 is a deficient number, since it is larger than the sum of its proper divisors (2613740).

6831631560121 is an frugal number, since it uses more digits than its factorization.

6831631560121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5227478 (or 2613739 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 6831631560121 in words is "six trillion, eight hundred thirty-one billion, six hundred thirty-one million, five hundred sixty thousand, one hundred twenty-one".