30155012 has 24 divisors (see below), whose sum is σ = 55762560. Its totient is φ = 14245280.

The previous prime is 30155009. The next prime is 30155017. The reversal of 30155012 is 21055103.

It is not an unprimeable number, because it can be changed into a prime (30155017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2687 + ... + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (2323440).

Almost surely, 2^30155012 is an apocalyptic number.

It is an amenable number.

30155012 is a deficient number, since it is larger than the sum of its proper divisors (25607548).

30155012 is a wasteful number, since it uses less digits than its factorization.

30155012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611 (or 5609 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 30155012 is about 5491.3579377054. The cubic root of 30155012 is about 311.2575073860.

Subtracting from 30155012 its reverse (21055103), we obtain a palindrome (9099909).

The spelling of 30155012 in words is "thirty million, one hundred fifty-five thousand, twelve".