30312553235491 has 2 divisors, whose sum is σ = 30312553235492. Its totient is φ = 30312553235490.

The previous prime is 30312553235353. The next prime is 30312553235581. The reversal of 30312553235491 is 19453235521303.

It is a strong prime.

It is an emirp because it is prime and its reverse (19453235521303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30312553235491 - 2³⁹ = 29762797421603 is a prime.

It is a super-2 number, since 2×30312553235491² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30312553235191) 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, 15156276617745 + 15156276617746.

It is an arithmetic number, because the mean of its divisors is an integer number (15156276617746).

Almost surely, 2^{30312553235491} is an apocalyptic number.

30312553235491 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312553235491 is an equidigital number, since it uses as much as digits as its factorization.

30312553235491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458000, while the sum is 46.

Adding to 30312553235491 its reverse (19453235521303), we get a palindrome (49765788756794).

The spelling of 30312553235491 in words is "thirty trillion, three hundred twelve billion, five hundred fifty-three million, two hundred thirty-five thousand, four hundred ninety-one".