231326820073 has 2 divisors, whose sum is σ = 231326820074. Its totient is φ = 231326820072.

The previous prime is 231326820061. The next prime is 231326820091. The reversal of 231326820073 is 370028623132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230387520169 + 939299904 = 479987^2 + 30648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231326820073 is a prime.

It is a super-2 number, since 2×231326820073² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (231326820773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115663410036 + 115663410037.

It is an arithmetic number, because the mean of its divisors is an integer number (115663410037).

Almost surely, 2^231326820073 is an apocalyptic number.

It is an amenable number.

231326820073 is a deficient number, since it is larger than the sum of its proper divisors (1).

231326820073 is an equidigital number, since it uses as much as digits as its factorization.

231326820073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 231326820073 in words is "two hundred thirty-one billion, three hundred twenty-six million, eight hundred twenty thousand, seventy-three".