656331243313231 has 4 divisors (see below), whose sum is σ = 659731923330592. Its totient is φ = 652930563295872.

The previous prime is 656331243313201. The next prime is 656331243313267. The reversal of 656331243313231 is 132313342133656.

656331243313231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 656331243313231 - 2³⁵ = 656296883574863 is a prime.

It is a super-2 number, since 2×656331243313231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656331243313201) 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, 1700340008391 + ... + 1700340008776.

It is an arithmetic number, because the mean of its divisors is an integer number (164932980832648).

Almost surely, 2^{656331243313231} is an apocalyptic number.

656331243313231 is a deficient number, since it is larger than the sum of its proper divisors (3400680017361).

656331243313231 is a wasteful number, since it uses less digits than its factorization.

656331243313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400680017360.

The product of its digits is 2099520, while the sum is 46.

Adding to 656331243313231 its reverse (132313342133656), we get a palindrome (788644585446887).

The spelling of 656331243313231 in words is "six hundred fifty-six trillion, three hundred thirty-one billion, two hundred forty-three million, three hundred thirteen thousand, two hundred thirty-one".