30993195481 has 2 divisors, whose sum is σ = 30993195482. Its totient is φ = 30993195480.

The previous prime is 30993195367. The next prime is 30993195509. The reversal of 30993195481 is 18459139903.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26077082256 + 4916113225 = 161484^2 + 70115^2 .

It is a cyclic number.

It is not a de Polignac number, because 30993195481 - 2²³ = 30984806873 is a prime.

It is a super-2 number, since 2×30993195481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30993195281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15496597740 + 15496597741.

It is an arithmetic number, because the mean of its divisors is an integer number (15496597741).

Almost surely, 2^30993195481 is an apocalyptic number.

It is an amenable number.

30993195481 is a deficient number, since it is larger than the sum of its proper divisors (1).

30993195481 is an equidigital number, since it uses as much as digits as its factorization.

30993195481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The spelling of 30993195481 in words is "thirty billion, nine hundred ninety-three million, one hundred ninety-five thousand, four hundred eighty-one".