656500313231 has 4 divisors (see below), whose sum is σ = 750286072272. Its totient is φ = 562714554192.

The previous prime is 656500313191. The next prime is 656500313243. The reversal of 656500313231 is 132313005656.

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

It is not a de Polignac number, because 656500313231 - 2¹⁴ = 656500296847 is a prime.

It is a super-2 number, since 2×656500313231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 656500313191 and 656500313200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656500313281) 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, 46892879510 + ... + 46892879523.

It is an arithmetic number, because the mean of its divisors is an integer number (187571518068).

Almost surely, 2^656500313231 is an apocalyptic number.

656500313231 is a deficient number, since it is larger than the sum of its proper divisors (93785759041).

656500313231 is an equidigital number, since it uses as much as digits as its factorization.

656500313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93785759040.

The product of its (nonzero) digits is 48600, while the sum is 35.

Adding to 656500313231 its reverse (132313005656), we get a palindrome (788813318887).

The spelling of 656500313231 in words is "six hundred fifty-six billion, five hundred million, three hundred thirteen thousand, two hundred thirty-one".