30803528381 has 2 divisors, whose sum is σ = 30803528382. Its totient is φ = 30803528380.

The previous prime is 30803528377. The next prime is 30803528447. The reversal of 30803528381 is 18382530803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26435508100 + 4368020281 = 162590^2 + 66091^2 .

It is a cyclic number.

It is not a de Polignac number, because 30803528381 - 2² = 30803528377 is a prime.

It is a super-2 number, since 2×30803528381² (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 (30803528351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15401764190 + 15401764191.

It is an arithmetic number, because the mean of its divisors is an integer number (15401764191).

Almost surely, 2^30803528381 is an apocalyptic number.

It is an amenable number.

30803528381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30803528381 is an equidigital number, since it uses as much as digits as its factorization.

30803528381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 30803528381 in words is "thirty billion, eight hundred three million, five hundred twenty-eight thousand, three hundred eighty-one".