30313081 has 2 divisors, whose sum is σ = 30313082. Its totient is φ = 30313080.

The previous prime is 30313069. The next prime is 30313123. The reversal of 30313081 is 18031303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 2223081 = 5300^2 + 1491^2 .

It is a cyclic number.

It is not a de Polignac number, because 30313081 - 2¹⁹ = 29788793 is a prime.

It is a super-2 number, since 2×30313081² = 1837765759425122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30313001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15156540 + 15156541.

It is an arithmetic number, because the mean of its divisors is an integer number (15156541).

Almost surely, 2^30313081 is an apocalyptic number.

It is an amenable number.

30313081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30313081 is an equidigital number, since it uses as much as digits as its factorization.

30313081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30313081 is about 5505.7316498355. The cubic root of 30313081 is about 311.8004181883.

Adding to 30313081 its reverse (18031303), we get a palindrome (48344384).

The spelling of 30313081 in words is "thirty million, three hundred thirteen thousand, eighty-one".