30520161 has 12 divisors (see below), whose sum is σ = 50382592. Its totient is φ = 17440056.

The previous prime is 30520157. The next prime is 30520163. The reversal of 30520161 is 16102503.

It is not a de Polignac number, because 30520161 - 2² = 30520157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30520163) 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 11 ways as a sum of consecutive naturals, for example, 242161 + ... + 242286.

Almost surely, 2^30520161 is an apocalyptic number.

It is an amenable number.

30520161 is a deficient number, since it is larger than the sum of its proper divisors (19862431).

30520161 is a wasteful number, since it uses less digits than its factorization.

30520161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484460 (or 484457 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 30520161 is about 5524.5054982324. The cubic root of 30520161 is about 312.5088159646.

Adding to 30520161 its reverse (16102503), we get a palindrome (46622664).

The spelling of 30520161 in words is "thirty million, five hundred twenty thousand, one hundred sixty-one".