30301681 has 2 divisors, whose sum is σ = 30301682. Its totient is φ = 30301680.

The previous prime is 30301679. The next prime is 30301693. The reversal of 30301681 is 18610303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26615281 + 3686400 = 5159^2 + 1920^2 .

It is an emirp because it is prime and its reverse (18610303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30301681 - 2¹ = 30301679 is a prime.

It is a super-2 number, since 2×30301681² = 1836383742851522, which contains 22 as substring.

Together with 30301679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30302681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15150840 + 15150841.

It is an arithmetic number, because the mean of its divisors is an integer number (15150841).

Almost surely, 2^30301681 is an apocalyptic number.

It is an amenable number.

30301681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30301681 is an equidigital number, since it uses as much as digits as its factorization.

30301681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 30301681 is about 5504.6962677336. The cubic root of 30301681 is about 311.7613264790.

Adding to 30301681 its reverse (18610303), we get a palindrome (48911984).

The spelling of 30301681 in words is "thirty million, three hundred one thousand, six hundred eighty-one".