30883681 has 2 divisors, whose sum is σ = 30883682. Its totient is φ = 30883680.

The previous prime is 30883649. The next prime is 30883711. The reversal of 30883681 is 18638803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15673681 + 15210000 = 3959^2 + 3900^2 .

It is an emirp because it is prime and its reverse (18638803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30883681 - 2⁵ = 30883649 is a prime.

It is a super-2 number, since 2×30883681² = 1907603504219522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30883681.

It is not a weakly prime, because it can be changed into another prime (30883631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15441840 + 15441841.

It is an arithmetic number, because the mean of its divisors is an integer number (15441841).

Almost surely, 2^30883681 is an apocalyptic number.

It is an amenable number.

30883681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30883681 is an equidigital number, since it uses as much as digits as its factorization.

30883681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 30883681 is about 5557.3087911326. The cubic root of 30883681 is about 313.7446671369.

The spelling of 30883681 in words is "thirty million, eight hundred eighty-three thousand, six hundred eighty-one".