30272161 has 2 divisors, whose sum is σ = 30272162. Its totient is φ = 30272160.

The previous prime is 30272159. The next prime is 30272191. The reversal of 30272161 is 16127203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15210000 + 15062161 = 3900^2 + 3881^2 .

It is a cyclic number.

It is not a de Polignac number, because 30272161 - 2¹ = 30272159 is a prime.

Together with 30272159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30272131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15136080 + 15136081.

It is an arithmetic number, because the mean of its divisors is an integer number (15136081).

Almost surely, 2^30272161 is an apocalyptic number.

It is an amenable number.

30272161 is a deficient number, since it is larger than the sum of its proper divisors (1).

30272161 is an equidigital number, since it uses as much as digits as its factorization.

30272161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 30272161 is about 5502.0142675206. The cubic root of 30272161 is about 311.6600539393.

Adding to 30272161 its reverse (16127203), we get a palindrome (46399364).

The spelling of 30272161 in words is "thirty million, two hundred seventy-two thousand, one hundred sixty-one".