30811012 has 12 divisors (see below), whose sum is σ = 54019980. Its totient is φ = 15376736.

The previous prime is 30811009. The next prime is 30811019. The reversal of 30811012 is 21011803.

It can be written as a sum of positive squares in 2 ways, for example, as 3625216 + 27185796 = 1904^2 + 5214^2 .

It is not an unprimeable number, because it can be changed into a prime (30811019) 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 3 ways as a sum of consecutive naturals, for example, 4687 + ... + 9142.

It is an arithmetic number, because the mean of its divisors is an integer number (4501665).

Almost surely, 2^30811012 is an apocalyptic number.

It is an amenable number.

30811012 is a deficient number, since it is larger than the sum of its proper divisors (23208968).

30811012 is a wasteful number, since it uses less digits than its factorization.

30811012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14390 (or 14388 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 30811012 is about 5550.7667938763. The cubic root of 30811012 is about 313.4983944967.

Adding to 30811012 its reverse (21011803), we get a palindrome (51822815).

The spelling of 30811012 in words is "thirty million, eight hundred eleven thousand, twelve".