30311320157 has 2 divisors, whose sum is σ = 30311320158. Its totient is φ = 30311320156.

The previous prime is 30311320087. The next prime is 30311320177. The reversal of 30311320157 is 75102311303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27597847876 + 2713472281 = 166126^2 + 52091^2 .

It is an emirp because it is prime and its reverse (75102311303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30311320157 - 2³² = 26016352861 is a prime.

It is a super-2 number, since 2×30311320157² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30311320177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155660078 + 15155660079.

It is an arithmetic number, because the mean of its divisors is an integer number (15155660079).

Almost surely, 2^30311320157 is an apocalyptic number.

It is an amenable number.

30311320157 is a deficient number, since it is larger than the sum of its proper divisors (1).

30311320157 is an equidigital number, since it uses as much as digits as its factorization.

30311320157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 26.

The spelling of 30311320157 in words is "thirty billion, three hundred eleven million, three hundred twenty thousand, one hundred fifty-seven".