30056161 has 4 divisors (see below), whose sum is σ = 30107952. Its totient is φ = 30004372.

The previous prime is 30056123. The next prime is 30056189. The reversal of 30056161 is 16165003.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16165003 = 151 ⋅107053.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30056161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30056111) 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, 25015 + ... + 26188.

It is an arithmetic number, because the mean of its divisors is an integer number (7526988).

Almost surely, 2^30056161 is an apocalyptic number.

It is an amenable number.

30056161 is a deficient number, since it is larger than the sum of its proper divisors (51791).

30056161 is an equidigital number, since it uses as much as digits as its factorization.

30056161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51790.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 30056161 is about 5482.3499523471. The cubic root of 30056161 is about 310.9170244894.

The spelling of 30056161 in words is "thirty million, fifty-six thousand, one hundred sixty-one".