30117071 has 16 divisors (see below), whose sum is σ = 32778240. Its totient is φ = 27578880.

The previous prime is 30117067. The next prime is 30117079. The reversal of 30117071 is 17071103.

It is not a de Polignac number, because 30117071 - 2² = 30117067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30117079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155951 + ... + 156143.

It is an arithmetic number, because the mean of its divisors is an integer number (2048640).

Almost surely, 2^30117071 is an apocalyptic number.

30117071 is a deficient number, since it is larger than the sum of its proper divisors (2661169).

30117071 is a wasteful number, since it uses less digits than its factorization.

30117071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 147, while the sum is 20.

The square root of 30117071 is about 5487.9022403829. The cubic root of 30117071 is about 311.1269113243.

Adding to 30117071 its reverse (17071103), we get a palindrome (47188174).

The spelling of 30117071 in words is "thirty million, one hundred seventeen thousand, seventy-one".