30880813 has 2 divisors, whose sum is σ = 30880814. Its totient is φ = 30880812.

The previous prime is 30880807. The next prime is 30880819. The reversal of 30880813 is 31808803.

It is a balanced prime because it is at equal distance from previous prime (30880807) and next prime (30880819).

It can be written as a sum of positive squares in only one way, i.e., 23687689 + 7193124 = 4867^2 + 2682^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30880813 is a prime.

It is a super-2 number, since 2×30880813² = 1907249223081938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30880819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15440406 + 15440407.

It is an arithmetic number, because the mean of its divisors is an integer number (15440407).

Almost surely, 2^30880813 is an apocalyptic number.

It is an amenable number.

30880813 is a deficient number, since it is larger than the sum of its proper divisors (1).

30880813 is an equidigital number, since it uses as much as digits as its factorization.

30880813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 30880813 is about 5557.0507465741. The cubic root of 30880813 is about 313.7349549142.

The spelling of 30880813 in words is "thirty million, eight hundred eighty thousand, eight hundred thirteen".