30975180281 has 2 divisors, whose sum is σ = 30975180282. Its totient is φ = 30975180280.

The previous prime is 30975180209. The next prime is 30975180319. The reversal of 30975180281 is 18208157903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27852605881 + 3122574400 = 166891^2 + 55880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30975180281 is a prime.

It is a super-2 number, since 2×30975180281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30975180581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15487590140 + 15487590141.

It is an arithmetic number, because the mean of its divisors is an integer number (15487590141).

Almost surely, 2^30975180281 is an apocalyptic number.

It is an amenable number.

30975180281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30975180281 is an equidigital number, since it uses as much as digits as its factorization.

30975180281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 30975180281 in words is "thirty billion, nine hundred seventy-five million, one hundred eighty thousand, two hundred eighty-one".