30157171 has 4 divisors (see below), whose sum is σ = 32898744. Its totient is φ = 27415600.

The previous prime is 30157157. The next prime is 30157207. The reversal of 30157171 is 17175103.

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 30157171 - 2¹¹ = 30155123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30157111) 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, 1370770 + ... + 1370791.

It is an arithmetic number, because the mean of its divisors is an integer number (8224686).

Almost surely, 2^30157171 is an apocalyptic number.

30157171 is a deficient number, since it is larger than the sum of its proper divisors (2741573).

30157171 is a wasteful number, since it uses less digits than its factorization.

30157171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741572.

The product of its (nonzero) digits is 735, while the sum is 25.

The square root of 30157171 is about 5491.5545157997. The cubic root of 30157171 is about 311.2649355478.

The spelling of 30157171 in words is "thirty million, one hundred fifty-seven thousand, one hundred seventy-one".