30212161 has 4 divisors (see below), whose sum is σ = 34528192. Its totient is φ = 25896132.

The previous prime is 30212153. The next prime is 30212167. The reversal of 30212161 is 16121203.

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: 16121203 = 7 ⋅2303029.

It is a cyclic number.

It is not a de Polignac number, because 30212161 - 2³ = 30212153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30212167) 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, 2158005 + ... + 2158018.

It is an arithmetic number, because the mean of its divisors is an integer number (8632048).

Almost surely, 2^30212161 is an apocalyptic number.

It is an amenable number.

30212161 is a deficient number, since it is larger than the sum of its proper divisors (4316031).

30212161 is an equidigital number, since it uses as much as digits as its factorization.

30212161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4316030.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 30212161 is about 5496.5590145108. The cubic root of 30212161 is about 311.4540123645.

Adding to 30212161 its reverse (16121203), we get a palindrome (46333364).

The spelling of 30212161 in words is "thirty million, two hundred twelve thousand, one hundred sixty-one".