2231368681 has 4 divisors (see below), whose sum is σ = 2233667664. Its totient is φ = 2229069700.

The previous prime is 2231368679. The next prime is 2231368687. The reversal of 2231368681 is 1868631322.

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 not a de Polignac number, because 2231368681 - 2¹ = 2231368679 is a prime.

It is a super-3 number, since 3×2231368681³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231368687) 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, 1148035 + ... + 1149976.

It is an arithmetic number, because the mean of its divisors is an integer number (558416916).

Almost surely, 2^2231368681 is an apocalyptic number.

It is an amenable number.

2231368681 is a deficient number, since it is larger than the sum of its proper divisors (2298983).

2231368681 is an equidigital number, since it uses as much as digits as its factorization.

2231368681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298982.

The product of its digits is 82944, while the sum is 40.

The square root of 2231368681 is about 47237.3653054444. The cubic root of 2231368681 is about 1306.7437884495.

The spelling of 2231368681 in words is "two billion, two hundred thirty-one million, three hundred sixty-eight thousand, six hundred eighty-one".