30031010981 has 2 divisors, whose sum is σ = 30031010982. Its totient is φ = 30031010980.

The previous prime is 30031010963. The next prime is 30031011019. The reversal of 30031010981 is 18901013003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29776608481 + 254402500 = 172559^2 + 15950^2 .

It is an emirp because it is prime and its reverse (18901013003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30031010981 - 2²⁶ = 29963902117 is a prime.

It is a super-2 number, since 2×30031010981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30031010981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30031010381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15015505490 + 15015505491.

It is an arithmetic number, because the mean of its divisors is an integer number (15015505491).

Almost surely, 2^30031010981 is an apocalyptic number.

It is an amenable number.

30031010981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30031010981 is an equidigital number, since it uses as much as digits as its factorization.

30031010981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

Adding to 30031010981 its reverse (18901013003), we get a palindrome (48932023984).

The spelling of 30031010981 in words is "thirty billion, thirty-one million, ten thousand, nine hundred eighty-one".