30031916 has 12 divisors (see below), whose sum is σ = 53066832. Its totient is φ = 14869968.

The previous prime is 30031891. The next prime is 30031921. The reversal of 30031916 is 61913003.

It is a junction number, because it is equal to n+sod(n) for n = 30031891 and 30031900.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36035 + ... + 36858.

It is an arithmetic number, because the mean of its divisors is an integer number (4422236).

Almost surely, 2^30031916 is an apocalyptic number.

It is an amenable number.

30031916 is a deficient number, since it is larger than the sum of its proper divisors (23034916).

30031916 is a wasteful number, since it uses less digits than its factorization.

30031916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73000 (or 72998 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 30031916 is about 5480.1383194222. The cubic root of 30031916 is about 310.8334009125.

Adding to 30031916 its reverse (61913003), we get a palindrome (91944919).

The spelling of 30031916 in words is "thirty million, thirty-one thousand, nine hundred sixteen".