30312442157 has 2 divisors, whose sum is σ = 30312442158. Its totient is φ = 30312442156.

The previous prime is 30312442117. The next prime is 30312442177. The reversal of 30312442157 is 75124421303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25386367561 + 4926074596 = 159331^2 + 70186^2 .

It is a cyclic number.

It is not a de Polignac number, because 30312442157 - 2²⁴ = 30295664941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30312442117) 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, 15156221078 + 15156221079.

It is an arithmetic number, because the mean of its divisors is an integer number (15156221079).

Almost surely, 2^30312442157 is an apocalyptic number.

It is an amenable number.

30312442157 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312442157 is an equidigital number, since it uses as much as digits as its factorization.

30312442157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 30312442157 in words is "thirty billion, three hundred twelve million, four hundred forty-two thousand, one hundred fifty-seven".