30320311261 has 2 divisors, whose sum is σ = 30320311262. Its totient is φ = 30320311260.

The previous prime is 30320311211. The next prime is 30320311297. The reversal of 30320311261 is 16211302303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17760626361 + 12559684900 = 133269^2 + 112070^2 .

It is a cyclic number.

It is not a de Polignac number, because 30320311261 - 2¹⁵ = 30320278493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30320311211) 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 as a sum of consecutive naturals, namely, 15160155630 + 15160155631.

It is an arithmetic number, because the mean of its divisors is an integer number (15160155631).

Almost surely, 2^30320311261 is an apocalyptic number.

It is an amenable number.

30320311261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30320311261 is an equidigital number, since it uses as much as digits as its factorization.

30320311261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 30320311261 its reverse (16211302303), we get a palindrome (46531613564).

The spelling of 30320311261 in words is "thirty billion, three hundred twenty million, three hundred eleven thousand, two hundred sixty-one".