30983381 has 12 divisors (see below), whose sum is σ = 36677676. Its totient is φ = 25998720.

The previous prime is 30983377. The next prime is 30983383. The reversal of 30983381 is 18338903.

It can be written as a sum of positive squares in 2 ways, for example, as 4368100 + 26615281 = 2090^2 + 5159^2 .

It is not a de Polignac number, because 30983381 - 2² = 30983377 is a prime.

It is a super-2 number, since 2×30983381² = 1919939796382322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30983383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8276 + ... + 11421.

It is an arithmetic number, because the mean of its divisors is an integer number (3056473).

Almost surely, 2^30983381 is an apocalyptic number.

It is an amenable number.

30983381 is a deficient number, since it is larger than the sum of its proper divisors (5694295).

30983381 is a wasteful number, since it uses less digits than its factorization.

30983381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19732 (or 19721 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 30983381 is about 5566.2717324974. The cubic root of 30983381 is about 314.0819190702.

The spelling of 30983381 in words is "thirty million, nine hundred eighty-three thousand, three hundred eighty-one".