30715461281 has 2 divisors, whose sum is σ = 30715461282. Its totient is φ = 30715461280.

The previous prime is 30715461277. The next prime is 30715461347. The reversal of 30715461281 is 18216451703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17851364881 + 12864096400 = 133609^2 + 113420^2 .

It is a cyclic number.

It is not a de Polignac number, because 30715461281 - 2² = 30715461277 is a prime.

It is a super-2 number, since 2×30715461281² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30715461221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15357730640 + 15357730641.

It is an arithmetic number, because the mean of its divisors is an integer number (15357730641).

Almost surely, 2^30715461281 is an apocalyptic number.

It is an amenable number.

30715461281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30715461281 is an equidigital number, since it uses as much as digits as its factorization.

30715461281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 30715461281 in words is "thirty billion, seven hundred fifteen million, four hundred sixty-one thousand, two hundred eighty-one".