30647881321 has 2 divisors, whose sum is σ = 30647881322. Its totient is φ = 30647881320.

The previous prime is 30647881247. The next prime is 30647881373. The reversal of 30647881321 is 12318874603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28135365696 + 2512515625 = 167736^2 + 50125^2 .

It is a cyclic number.

It is not a de Polignac number, because 30647881321 - 2²³ = 30639492713 is a prime.

It is a super-2 number, since 2×30647881321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30647884321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15323940660 + 15323940661.

It is an arithmetic number, because the mean of its divisors is an integer number (15323940661).

Almost surely, 2^30647881321 is an apocalyptic number.

It is an amenable number.

30647881321 is a deficient number, since it is larger than the sum of its proper divisors (1).

30647881321 is an equidigital number, since it uses as much as digits as its factorization.

30647881321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 30647881321 in words is "thirty billion, six hundred forty-seven million, eight hundred eighty-one thousand, three hundred twenty-one".