30042145181 has 2 divisors, whose sum is σ = 30042145182. Its totient is φ = 30042145180.

The previous prime is 30042145171. The next prime is 30042145249. The reversal of 30042145181 is 18154124003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17334092281 + 12708052900 = 131659^2 + 112730^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30042145181 is a prime.

It is a super-2 number, since 2×30042145181² (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 (30042145141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15021072590 + 15021072591.

It is an arithmetic number, because the mean of its divisors is an integer number (15021072591).

Almost surely, 2^30042145181 is an apocalyptic number.

It is an amenable number.

30042145181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30042145181 is an equidigital number, since it uses as much as digits as its factorization.

30042145181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 30042145181 its reverse (18154124003), we get a palindrome (48196269184).

The spelling of 30042145181 in words is "thirty billion, forty-two million, one hundred forty-five thousand, one hundred eighty-one".