30320681 has 2 divisors, whose sum is σ = 30320682. Its totient is φ = 30320680.

The previous prime is 30320663. The next prime is 30320701. The reversal of 30320681 is 18602303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29539225 + 781456 = 5435^2 + 884^2 .

It is a cyclic number.

It is not a de Polignac number, because 30320681 - 2¹⁸ = 30058537 is a prime.

It is a super-2 number, since 2×30320681² = 1838687392607522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30320651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15160340 + 15160341.

It is an arithmetic number, because the mean of its divisors is an integer number (15160341).

Almost surely, 2^30320681 is an apocalyptic number.

It is an amenable number.

30320681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30320681 is an equidigital number, since it uses as much as digits as its factorization.

30320681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30320681 is about 5506.4217964119. The cubic root of 30320681 is about 311.8264738831.

Adding to 30320681 its reverse (18602303), we get a palindrome (48922984).

The spelling of 30320681 in words is "thirty million, three hundred twenty thousand, six hundred eighty-one".