30191085 has 24 divisors (see below), whose sum is σ = 52550784. Its totient is φ = 16034400.

The previous prime is 30191081. The next prime is 30191123. The reversal of 30191085 is 58019103.

It is not a de Polignac number, because 30191085 - 2² = 30191081 is a prime.

It is a super-2 number, since 2×30191085² = 1823003226954450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30191081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10560 + ... + 13110.

It is an arithmetic number, because the mean of its divisors is an integer number (2189616).

Almost surely, 2^30191085 is an apocalyptic number.

It is an amenable number.

30191085 is a deficient number, since it is larger than the sum of its proper divisors (22359699).

30191085 is a wasteful number, since it uses less digits than its factorization.

30191085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2822 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 30191085 is about 5494.6414805700. The cubic root of 30191085 is about 311.3815720895.

The spelling of 30191085 in words is "thirty million, one hundred ninety-one thousand, eighty-five".