231302323261 has 2 divisors, whose sum is σ = 231302323262. Its totient is φ = 231302323260.

The previous prime is 231302323247. The next prime is 231302323279. The reversal of 231302323261 is 162323203132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200609035236 + 30693288025 = 447894^2 + 175195^2 .

It is a cyclic number.

It is not a de Polignac number, because 231302323261 - 2¹¹ = 231302321213 is a prime.

It is a super-2 number, since 2×231302323261² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231302323061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651161630 + 115651161631.

It is an arithmetic number, because the mean of its divisors is an integer number (115651161631).

Almost surely, 2^231302323261 is an apocalyptic number.

It is an amenable number.

231302323261 is a deficient number, since it is larger than the sum of its proper divisors (1).

231302323261 is an equidigital number, since it uses as much as digits as its factorization.

231302323261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 231302323261 its reverse (162323203132), we get a palindrome (393625526393).

The spelling of 231302323261 in words is "two hundred thirty-one billion, three hundred two million, three hundred twenty-three thousand, two hundred sixty-one".