30203172971 has 2 divisors, whose sum is σ = 30203172972. Its totient is φ = 30203172970.

The previous prime is 30203172917. The next prime is 30203172983. The reversal of 30203172971 is 17927130203.

Together with previous prime (30203172917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (17927130203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30203172971 - 2⁶ = 30203172907 is a prime.

It is a super-2 number, since 2×30203172971² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30203172371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15101586485 + 15101586486.

It is an arithmetic number, because the mean of its divisors is an integer number (15101586486).

Almost surely, 2^30203172971 is an apocalyptic number.

30203172971 is a deficient number, since it is larger than the sum of its proper divisors (1).

30203172971 is an equidigital number, since it uses as much as digits as its factorization.

30203172971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 35.

The spelling of 30203172971 in words is "thirty billion, two hundred three million, one hundred seventy-two thousand, nine hundred seventy-one".