30031013 has 4 divisors (see below), whose sum is σ = 30842700. Its totient is φ = 29219328.

The previous prime is 30030991. The next prime is 30031021. The reversal of 30031013 is 31013003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25877569 + 4153444 = 5087^2 + 2038^2 .

It is a cyclic number.

It is not a de Polignac number, because 30031013 - 2⁸ = 30030757 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30030985 and 30031003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30031063) 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 3 ways as a sum of consecutive naturals, for example, 405788 + ... + 405861.

It is an arithmetic number, because the mean of its divisors is an integer number (7710675).

Almost surely, 2^30031013 is an apocalyptic number.

It is an amenable number.

30031013 is a deficient number, since it is larger than the sum of its proper divisors (811687).

30031013 is an equidigital number, since it uses as much as digits as its factorization.

30031013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811686.

The product of its (nonzero) digits is 27, while the sum is 11.

The square root of 30031013 is about 5480.0559303715. The cubic root of 30031013 is about 310.8302855005.

Adding to 30031013 its reverse (31013003), we get a palindrome (61044016).

It can be divided in two parts, 300 and 31013, that added together give a palindrome (31313).

The spelling of 30031013 in words is "thirty million, thirty-one thousand, thirteen".