30943381 has 16 divisors (see below), whose sum is σ = 37445760. Its totient is φ = 24978240.

The previous prime is 30943331. The next prime is 30943391. The reversal of 30943381 is 18334903.

It is not a de Polignac number, because 30943381 - 2⁹ = 30942869 is a prime.

It is a super-2 number, since 2×30943381² = 1914985655422322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30943331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25611 + ... + 26791.

It is an arithmetic number, because the mean of its divisors is an integer number (2340360).

Almost surely, 2^30943381 is an apocalyptic number.

It is an amenable number.

30943381 is a deficient number, since it is larger than the sum of its proper divisors (6502379).

30943381 is a wasteful number, since it uses less digits than its factorization.

30943381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30943381 is about 5562.6775027859. The cubic root of 30943381 is about 313.9466994062.

The spelling of 30943381 in words is "thirty million, nine hundred forty-three thousand, three hundred eighty-one".