4321512161 has 2 divisors, whose sum is σ = 4321512162. Its totient is φ = 4321512160.

The previous prime is 4321512157. The next prime is 4321512229. The reversal of 4321512161 is 1612151234.

4321512161 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3108731536 + 1212780625 = 55756^2 + 34825^2 .

It is a cyclic number.

It is not a de Polignac number, because 4321512161 - 2² = 4321512157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4321512161.

It is not a weakly prime, because it can be changed into another prime (4321512101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2160756080 + 2160756081.

It is an arithmetic number, because the mean of its divisors is an integer number (2160756081).

Almost surely, 2^4321512161 is an apocalyptic number.

It is an amenable number.

4321512161 is a deficient number, since it is larger than the sum of its proper divisors (1).

4321512161 is an equidigital number, since it uses as much as digits as its factorization.

4321512161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 4321512161 is about 65738.2092926176. The cubic root of 4321512161 is about 1628.8405772544.

Adding to 4321512161 its reverse (1612151234), we get a palindrome (5933663395).

The spelling of 4321512161 in words is "four billion, three hundred twenty-one million, five hundred twelve thousand, one hundred sixty-one".