231326820061 has 2 divisors, whose sum is σ = 231326820062. Its totient is φ = 231326820060.

The previous prime is 231326820059. The next prime is 231326820073. The reversal of 231326820061 is 160028623132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208123914436 + 23202905625 = 456206^2 + 152325^2 .

It is a cyclic number.

It is not a de Polignac number, because 231326820061 - 2¹ = 231326820059 is a prime.

Together with 231326820059, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 231326819999 and 231326820026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231326820031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115663410030 + 115663410031.

It is an arithmetic number, because the mean of its divisors is an integer number (115663410031).

Almost surely, 2^231326820061 is an apocalyptic number.

It is an amenable number.

231326820061 is a deficient number, since it is larger than the sum of its proper divisors (1).

231326820061 is an equidigital number, since it uses as much as digits as its factorization.

231326820061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 231326820061 in words is "two hundred thirty-one billion, three hundred twenty-six million, eight hundred twenty thousand, sixty-one".