30085031 has 4 divisors (see below), whose sum is σ = 30139032. Its totient is φ = 30031032.

The previous prime is 30085009. The next prime is 30085049. The reversal of 30085031 is 13058003.

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

It is a cyclic number.

It is not a de Polignac number, because 30085031 - 2¹⁰ = 30084007 is a prime.

It is a super-2 number, since 2×30085031² = 1810218180541922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30084994 and 30085012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30085051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26156 + ... + 27281.

It is an arithmetic number, because the mean of its divisors is an integer number (7534758).

Almost surely, 2^30085031 is an apocalyptic number.

30085031 is a deficient number, since it is larger than the sum of its proper divisors (54001).

30085031 is an equidigital number, since it uses as much as digits as its factorization.

30085031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54000.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 30085031 is about 5484.9823153771. The cubic root of 30085031 is about 311.0165415463.

The spelling of 30085031 in words is "thirty million, eighty-five thousand, thirty-one".